• Plato

Apology, Crito, and Phaedo of Socrates
Laws
Phaedo
Apology
Gorgias
Meno
Theaetetus
Timaeus
Euthyphro
Phaedrus
Symposium
The Republic

• Aristotle

Poetics
Nicomachean Ethics
Politics

• Boethius

The Consolation of Philosophy

• Augustine

The Confessions

• Kant

Fundamental Principles of the Metaphysic of Morals
The Critique of Pure Reason

• Nietzsche

Thus Spake Zarathustra

• Russell

The Problems of Philosophy

• William James

Varieties of Religious Experience, a Study in Human Nature