Eppur si muove (And yet it moves). — Galileo Galilei

Reality is that which, when you stop believing in it, doesn't go away. — Philip K. Dick

All of humanity's problems stem from man's inability to sit quietly in a room alone. — Blaise Pascal

It is wrong always, everywhere, and for anyone to believe anything on insufficient evidence. — W. K. Clifford

When are you from? — Sarah Connor

Your Manuscript Is Good and Original, But What is Original Is Not Good; What Is Good Is Not Original. — Dr. Samuel Johnson

I know that I know nothing. — Socrates

If you're certain, you're most certainly wrong. — Bertrand Russell

Yesterday is history, tomorrow is a mystery. Today is a gift, that's why it's called the present. — Master Oogway

Heraclitus wept as Democritus laughed. Life is, after all, a cruel joke. — TheMadFool

Certum est, quia impossibile (It is certain, because it is impossible). — Tertullian

Credo quia absurdum (I believe because it is absurd). — Tertullian

Extraordinary claims require extraordinary evidence. — Carl Sagan

Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as not to be beaten, and to be burned is not the same as not to be burned. — Ibn Sina

Those who know do not speak. Those who speak do not know. — Lao Tzu

The heart has reasons that reason cannot know. — Blaise Pascal (Irrationalism)

There is only one really serious philosophical question, and that is suicide. — Albert Camus

A man's maturity is to have rediscovered the seriousness he possessed as a child at play. — Friedrich Nietzsche

The tyrant dies and his rule is over; the martyr dies, and his rule commences. — Søren Kierkegaard

Wir müssen wissen - Wir werden wissen (We must know - we will know). — David Hilbert

Too mathematical for musicians and too musical for mathematicians. — Anonymous (on Leonhard Euler's Tentamen novae theorae musicae)

Men talk of killing time, while time quietly kills them. — Dion Boucicault

For every complex problem there is an answer that is clear, simple, and wrong. — H. L. Mencken

A man always has two reasons for doing anything: a good reason and the real reason. — J. P. Morgan

Now I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly, dreaming I am a man. — Zhuangzi

Sarvam mithyā bravīmi (Everything I'm saying is false). — Bhartṛhari

From inability to let well alone, from too much zeal for the new and contempt for what is old, from putting knowledge before wisdom, science before art and cleverness before common sense, from treating patients as cases and from making the cure of the disease more grievous than the endurance of the same, good Lord deliver us. — Sir Robert Hutchison

As I shared with my professors years ago when I was in college, if all the evidence in the universe turns against creationism, I would be the first to admit it, but I would still be a creationist because that is what the Word of God seems to indicate. — Kurt Patrick Wise

Ex nihilo nihil fit. — Parmenides

Peace, that glorious moment in time when everyone stops and reloads. — Thomas Jefferson

I'm fed up with your questions! — KDT

Never attribute to malice that which is adequately explained by stupidity. — Robert J. Hanlon

Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful. — Lucius Annaeus Seneca

Assume nothing, question everything. — James Patterson

1. Nothing exists.

2. Even if something exists, nothing can be known about it.

3. Even if something can be known about it, knowledge about it can't be communicated to others.

4. Even if it can be communicated, it cannot be understood. — Gorgias

It's better not to understand. — C'Tse

You're too hungry to understand. — doctall_kingsley

Le meglio è l'inimico del bene (The perfect is the enemy of the good) — François-Marie Arouet aka Voltaire

If you meet the Buddha, kill him. — Linji Yixuan

Wise Men Speak Because They Have Something To Say; Fools Because They Have To Say Something. — Plato

I don't understand your point. The argument I provided was seductively valid. — Bartricks