Quotes & Sayings


We, and creation itself, actualize the possibilities of the God who sustains the world, towards becoming in the world in a fuller, more deeper way. - R.E. Slater

There is urgency in coming to see the world as a web of interrelated processes of which we are integral parts, so that all of our choices and actions have [consequential effects upon] the world around us. - Process Metaphysician Alfred North Whitehead

Kurt Gödel's Incompleteness Theorem says (i) all closed systems are unprovable within themselves and, that (ii) all open systems are rightly understood as incomplete. - R.E. Slater

The most true thing about you is what God has said to you in Christ, "You are My Beloved." - Tripp Fuller

The God among us is the God who refuses to be God without us, so great is God's Love. - Tripp Fuller

According to some Christian outlooks we were made for another world. Perhaps, rather, we were made for this world to recreate, reclaim, redeem, and renew unto God's future aspiration by the power of His Spirit. - R.E. Slater

Our eschatological ethos is to love. To stand with those who are oppressed. To stand against those who are oppressing. It is that simple. Love is our only calling and Christian Hope. - R.E. Slater

Secularization theory has been massively falsified. We don't live in an age of secularity. We live in an age of explosive, pervasive religiosity... an age of religious pluralism. - Peter L. Berger

Exploring the edge of life and faith in a post-everything world. - Todd Littleton

I don't need another reason to believe, your love is all around for me to see. – Anon

Thou art our need; and in giving us more of thyself thou givest us all. - Khalil Gibran, Prayer XXIII

Be careful what you pretend to be. You become what you pretend to be. - Kurt Vonnegut

Religious beliefs, far from being primary, are often shaped and adjusted by our social goals. - Jim Forest

We become who we are by what we believe and can justify. - R.E. Slater

People, even more than things, need to be restored, renewed, revived, reclaimed, and redeemed; never throw out anyone. – Anon

Certainly, God's love has made fools of us all. - R.E. Slater

An apocalyptic Christian faith doesn't wait for Jesus to come, but for Jesus to become in our midst. - R.E. Slater

Christian belief in God begins with the cross and resurrection of Jesus, not with rational apologetics. - Eberhard Jüngel, Jürgen Moltmann

Our knowledge of God is through the 'I-Thou' encounter, not in finding God at the end of a syllogism or argument. There is a grave danger in any Christian treatment of God as an object. The God of Jesus Christ and Scripture is irreducibly subject and never made as an object, a force, a power, or a principle that can be manipulated. - Emil Brunner

“Ehyeh Asher Ehyeh” means "I will be that who I have yet to become." - God (Ex 3.14) or, conversely, “I AM who I AM Becoming.”

Our job is to love others without stopping to inquire whether or not they are worthy. - Thomas Merton

The church is God's world-changing social experiment of bringing unlikes and differents to the Eucharist/Communion table to share life with one another as a new kind of family. When this happens, we show to the world what love, justice, peace, reconciliation, and life together is designed by God to be. The church is God's show-and-tell for the world to see how God wants us to live as a blended, global, polypluralistic family united with one will, by one Lord, and baptized by one Spirit. – Anon

The cross that is planted at the heart of the history of the world cannot be uprooted. - Jacques Ellul

The Unity in whose loving presence the universe unfolds is inside each person as a call to welcome the stranger, protect animals and the earth, respect the dignity of each person, think new thoughts, and help bring about ecological civilizations. - John Cobb & Farhan A. Shah

If you board the wrong train it is of no use running along the corridors of the train in the other direction. - Dietrich Bonhoeffer

God's justice is restorative rather than punitive; His discipline is merciful rather than punishing; His power is made perfect in weakness; and His grace is sufficient for all. – Anon

Our little [biblical] systems have their day; they have their day and cease to be. They are but broken lights of Thee, and Thou, O God art more than they. - Alfred Lord Tennyson

We can’t control God; God is uncontrollable. God can’t control us; God’s love is uncontrolling! - Thomas Jay Oord

Life in perspective but always in process... as we are relational beings in process to one another, so life events are in process in relation to each event... as God is to Self, is to world, is to us... like Father, like sons and daughters, like events... life in process yet always in perspective. - R.E. Slater

To promote societal transition to sustainable ways of living and a global society founded on a shared ethical framework which includes respect and care for the community of life, ecological integrity, universal human rights, respect for diversity, economic justice, democracy, and a culture of peace. - The Earth Charter Mission Statement

Christian humanism is the belief that human freedom, individual conscience, and unencumbered rational inquiry are compatible with the practice of Christianity or even intrinsic in its doctrine. It represents a philosophical union of Christian faith and classical humanist principles. - Scott Postma

It is never wise to have a self-appointed religious institution determine a nation's moral code. The opportunities for moral compromise and failure are high; the moral codes and creeds assuredly racist, discriminatory, or subjectively and religiously defined; and the pronouncement of inhumanitarian political objectives quite predictable. - R.E. Slater

God's love must both center and define the Christian faith and all religious or human faiths seeking human and ecological balance in worlds of subtraction, harm, tragedy, and evil. - R.E. Slater

In Whitehead’s process ontology, we can think of the experiential ground of reality as an eternal pulse whereby what is objectively public in one moment becomes subjectively prehended in the next, and whereby the subject that emerges from its feelings then perishes into public expression as an object (or “superject”) aiming for novelty. There is a rhythm of Being between object and subject, not an ontological division. This rhythm powers the creative growth of the universe from one occasion of experience to the next. This is the Whiteheadian mantra: “The many become one and are increased by one.” - Matthew Segall

Without Love there is no Truth. And True Truth is always Loving. There is no dichotomy between these terms but only seamless integration. This is the premier centering focus of a Processual Theology of Love. - R.E. Slater

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Note: Generally I do not respond to commentary. I may read the comments but wish to reserve my time to write (or write from the comments I read). Instead, I'd like to see our community help one another and in the helping encourage and exhort each of us towards Christian love in Christ Jesus our Lord and Savior. - re slater

Thursday, March 27, 2025

Timelines of Western Philosophy


School of Athens


The most famous philosophers of ancient times move within an imposing Renaissance architecture which is inspired by Bramante's project for the renewal of the early Christian basilica of St Peter. Some of these are easily recognizable. In the centre Plato points upwards with a finger and holds his book Timeus in his hand, flanked by Aristotle with Ethics; Pythagoras is shown in the foreground intent on explaining the diatesseron. Diogenes is lying on the stairs with a dish, while the pessimist philosopher, Heracleitus, a portrait of Michelangelo, is leaning against a block of marble, writing on a sheet of paper. Michelangelo was in those years executing the paintings in the nearby Sistine Chapel. On the right we see Euclid, who is teaching geometry to his pupils, Zoroaster holding the heavenly sphere and Ptolemy holding the earthly sphere. The personage on the extreme right with the black beret is a self-portrait of Raphael.


The work above depicts a scene of ancient Greek philosophy. Aristotle walks with his teacher and mentor Plato (whose appearance is modeled on Raphael’s close friend, fellow Renaissance thinker and painter Leonardo da Vinci.) The figure of Plato (center left, in orange and purple) is pointing upwards, symbolizing the Platonic ideology of philosophical idealism. The more youthful Aristotle (center right, in blue and brown) has his hand outstretched in front of him, encapsulating Aristotle’s pragmatic empirical mode of thought. Aristotle examined affairs practically as they are; Plato examined affairs idealistically as he thought they ought to be.


Socratic philosophy is a method of questioning and dialogue that encourages critical thinking and self-examination. It was developed by the ancient Greek philosopher Socrates of Athens (c. 470–399 BC).

Socratic method
  • Involves a teacher asking thought-provoking questions to students
  • Focuses on understanding the underlying beliefs of participants
  • Encourages students to ask questions and think critically
  • Creates a classroom environment that's productive and not intimidating
Socratic ideas
  • Philosophy should have practical results that improve society
  • Knowledge of virtue is necessary to become virtuous
  • All evil acts are committed out of ignorance
  • Committing an injustice is worse than suffering an injustice
  • The only thing one can be certain of is one's ignorance
  • The unexamined life is not worth living
Socrates' influence
  • Socrates' ideas influenced Western philosophy and Classical antiquity
  • He's considered the father of modern education
  • His ideas are reflected in the works of Plato, Xenophon, Søren Kierkegaard, and Friedrich Nietzsche
  • His ideas are also reflected in modern educational frameworks


Platonic philosophy is a system of thought that originated with the ancient Greek philosopher Plato (c.427-347 BC). It's based on the idea that the physical world is a reflection of unchanging Forms, or Ideas, which are the true reality.

Key concepts
  • Forms: Abstract objects that are non-physical, timeless, and unchangeable
  • Theory of Forms: The idea that the physical world is not as real as Forms
  • Platonic idealism: Another name for the Theory of Forms
  • Platonic realism: Another name for the Theory of Forms
  • Platonism's influence
  • Platonism has had a profound impact on Western thought.
Examples of Forms
  • Some examples of Forms include goodness, beauty, equality, bigness, likeness, unity, being, sameness, difference, change, and changelessness.
Platonic love
  • The term "platonic love" refers to a relationship between two people based on close intimacy and attraction, but without sexual intimacy.
Platonic society
  • Plato believed that a good society is based on virtue, including friendship, freedom, justice, wisdom, courage, and moderation.


Aristotelian philosophy, a tradition rooted in the work of Aristotle (c.384-322 BC), a polymath, whose works ranged across all philosophical fields emphasizing deductive logic, inductive methods, and the study of natural philosophy and metaphysics, including ethics and political theory, with a focus on virtue and the pursuit of human flourishing.

Here's a more detailed breakdown of key aspects of Aristotelian philosophy:

Core Concepts
  • Deductive and Inductive Logic:
  • Aristotle is credited with the development of formal logic, using deductive reasoning (syllogisms) and inductive methods to analyze and understand the world.
  • Metaphysics:
  • Aristotle explored the nature of reality, including the concepts of substance, form, matter, potentiality, and actuality, seeking to understand the fundamental principles of existence.
  • Ethics:
  • Aristotle's ethics, outlined in his Nicomachean Ethics, emphasizes the importance of developing virtuous character through habit and practice, leading to eudaimonia (flourishing or happiness).
  • Politics:
  • Aristotle's political philosophy, as explored in Politics, examines different forms of government and the ideal state, focusing on the common good and the importance of citizens' participation in public life.
  • Natural Philosophy:
  • Aristotle's natural philosophy, encompassing physics, biology, and other natural sciences, sought to understand the natural world through observation and reason, focusing on the causes and purposes of natural phenomena.
  • Four Causes:
  • Aristotle's theory of causation involves four types of causes: material, formal, efficient, and final, which help explain the nature and development of things.
  • Teleology:
  • Aristotle believed that everything has a purpose or telos, and that understanding the purpose of something is crucial to understanding its nature.

Key Areas of Influence
  • Western Scholasticism:
  • Aristotelian philosophy became the intellectual framework of Western Scholasticism during the Middle Ages, influencing theology and philosophy.
  • Virtue Ethics:
  • Aristotle's ethics has inspired the field of virtue ethics, which emphasizes character development and the pursuit of excellence.
  • Contemporary Philosophy:
  • Aristotle's ideas continue to influence contemporary philosophy, particularly in areas like metaphysics, political philosophy, and the philosophy of science.
  • Renaissance:
  • Aristotelian works were the subject of renewed interest in the Renaissance, with many commentaries on Aristotle's works being composed during this period.
  • Thomas Aquinas:
  • St. Thomas Aquinas, in the 13th century, attempted to reconcile Aristotelian philosophy and science with Christian dogma, influencing the theology and worldview of the Roman Catholic Church.


I Ancient Philosophy (Pre-Socratic to Hellenistic)
  • Pre-Socratics (6th-5th centuries BCE):
  • Thales, Anaximander, Anaximenes, Heraclitus, Parmenides, Empedocles, Zeno of Elea, Anaxagoras, Democritus.
  • Classical Greek Philosophy (5th-4th centuries BCE):
  • Socrates, Plato, Aristotle.
  • Hellenistic Philosophy (3rd century BCE - 1st century CE):
  • Epicurus, Zeno of Citium (founder of Stoicism), Pyrrhon of Elis.
  • Roman Philosophy (1st century BCE - 5th century CE):
  • Cicero, Seneca, Marcus Aurelius, Plotinus.

II Medieval Philosophy (5th-15th centuries CE)
  • Early Medieval (5th-10th centuries):
  • Augustine of Hippo.
  • High and Late Medieval (11th-15th centuries):
  • Boethius, Thomas Aquinas, William of Ockham.
  • Islamic Philosophy:
  • Al-Kindi, Avicenna, Averroes, Al-Ghazali.
  • Jewish Philosophy:
  • Maimonides.

III Renaissance and Early Modern Philosophy (15th-18th centuries)
  • Renaissance:
  • Machiavelli, Pico della Mirandola.
  • Early Modern (16th-18th centuries):
  • Francis Bacon, René Descartes, John Locke, Baruch Spinoza, Gottfried Wilhelm Leibniz, Isaac Newton.
  • Enlightenment:
  • John Locke, Jean-Jacques Rousseau, Immanuel Kant, Voltaire, Montesquieu.

IV Modern and Contemporary Philosophy (19th-21st centuries)
  • 19th Century:
  • Georg Wilhelm Friedrich Hegel, Friedrich Nietzsche, Karl Marx, Søren Kierkegaard, John Stuart Mill.
  • 20th Century:
  • Bertrand Russell, G.E. Moore (Analytic Philosophy), Friedrich Waismann, Ludwig Wittgenstein, Jean-Paul Sartre, Simone de Beauvoir, Martin Heidegger (Continental Philosophy), Hannah Arendt.
  • 21st Century:
  • Contemporary analytic and continental philosophy, feminist philosophy, postcolonial philosophy, philosophy of science, ethics, and political philosophy.

click to enlarge

A Timeline of Western Philosophers


600 B.C.E.
Thales
Anaximander
Anaximenes
Pythagoras
Xenophanes

500 B.C.E.
Heraclitus
Parmenides
Protagoras
Zeno of Elea
Hippias
Empedocles
Leucippus
Anaxagoras
Democritus
Socrates

400 B.C.E.
Aristippus
Antisthenes
Xenophon
Plato
Diogenes
Euclid
Aristotle
Xenocrates
Pyrrho

300 B.C.E.
Epicurus
Zeno of Citium
Timon
Archimedes
Chrysippus
Eratosthenes

200 B.C.E.
Carneades

100 B.C.E.
Lucretius
Cicero

C.E.
Philo
Seneca

100
Epictetus
Marcus Aurelius

200
Sextus Empiricus
Plotinus
Porphyry

300

400
Hypatia
Augustine

500
Boethius

600

700

800
al-Kindi
Erigena

900
al-Faràbi
Saadiah

1000
Ibn Sina
Ibn Gabirol
Anselm
al-Ghazàlì

1100
Abelard
Ibn Daud
Peter Lombard
Ibn Rushd
Maimonides

1200
Fibonacci
Grosseteste
Albert the Great
Roger Bacon
Aquinas
Bonaventure
Siger
Boetius of Dacia

1300
Scotus
Eckhart
Marsilius of Padua
Ockham
Gersonides
Buridan
Crescas

1400
Cusa
Valla
Pico della Mirandola
Ficino

1500
Erasmus
Machiavelli
Thomas More
Paracelsus
Copernicus
Ramus

1550
Teresa of Avila
Montaigne
Bruno
Suarez

1600
Kepler
Charron
Mersenne
Francis Bacon
Grotius
Galileo
Herbert of Cherbury
Gassendi
Princess Elizabeth
Fermat
Queen KristinaDescartes
HobbesFilmer

1650
Glanvill
Geulincx
Pascal
Henry More
Cordemoy
Nicole
Cudworth
Cavendish
Arnauld
Cumberland
Rohault
Foucher
Boyle
Malebranche
Pufendorf
Spinoza
Newton
Conway
Régis
Locke
Masham
Toland
Bayle
Souvré

1700
Clarke
Shaftesbury
Norris
Leibniz
Berkeley
Cockburn
Vico
Mandeville
Hutcheson
Butler
Wolff
Gay
Hume
La Mettrie
HartleyMontesquieu

1750
Euler
Condillac
Price d'Alembert
Voltaire
Diderot
Rousseau
Bayes
d'Holbach
Helvétius
Smith
Jefferson
Reid
Paine
Lessing
Burke
Kant
Wollstonecraft
Bentham
Mendelssohn
Stewart
Godwin
Schiller
Malthus
Paley
Fichte

1800
Gaussde
Staël
Schelling
Schleiermacher
LaplaceHegel
LamarckSaint-Simon
FourierSchopenhauer
Whately
Babbage
LobachevskyJohn AustinComte
WhewellJames MillProudhon
BolzanoEmersonFeuerbach
De MorganFullerKierkegaard
BooleThoreau

1850
RiemannSojourner TruthMarx
DarwinTaylorEngels
Hamilton
MendelJ. S. MillLotze
Spencer
VennAnthonyBakunin
CantorBrentano

1875
Sidgwick
DedekindClifford
PeirceCaird
MachGreen
FregeDiltheyNietzsche
CarrollBosanquet
PeanoStantonRitchie
DurkheimJamesRoyce
GilmanBradley
ParetoVeblen

1900
PlanckFreudWeberBergson
PoincareMeinongDuboisCook Wilson
DuhemHusserlAddamsSeth
ZermeloMooreCroce
EinsteinJungGoldmanVaihinger
BohrWatsonLuxemburgOtto
HilbertUnamuno
AdlerLeninSaussure
LukasciewiczDeweyTrotskyBuber
RussellWhitehead
MeadAlexanderMcTaggart
KeynesBroadLukácsSantayana

1925
ReichenbachLovejoyRossBerdyaev
HeisenbergSchlickKelsenHeidegger
NeurathRamseyHartmannCassirer
GödelPerryGramsciCollingwood
SchrödingerC. I. LewisIngarden
AyerBachelardMao ZedongMaritain
WaismannDayOrtega y Gasset
TarskiCarnapBlanshard
E. NagelPopperGandhi
HorneySartre
RyleH.H. PriceLangerCamus
StevensonHayekJaspers
Wittgenstein Adorno
TuringPrichardMarcelBeauvoir

1950
von NeumannLorenzWisdomTillich
HopperArrowHareMerleau-Ponty
PolyaSkinnerBerlinWeil
ChurchAnscombeRandHorkheimer
FeiglAustinHampshireArendt
HempelStrawsonKurt BaierGadamer
QuineGriceHartLacan
GoodmanSellarsHabermas
KuhnSmartMarcuse
FeynmanBergmannRicoeur
GettierArmstrongKingAlthusser
ChomskyChisholmDerrida
SearleLakatosRawlsFoucault
KripkeE.O. WilsonDeleuze

1975
FeyerabendThomsonSingerEco
DummettPutnamDworkinLyotard
DavidsonT. NagelMidgleyDaly
HofstadterRortyNozickCixous
MandelbrotKimReganLe Dœuff
HarawayGilliganKristeva
MinskyAppiahNoddingsIrigaray
Lehrer Annette Baier Held
HardingRuddickHoagland
KemerlingMacKinnon
DennettNussbaumBordo
Westhooks

2000





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