Whereof one cannot speak, thereof one must be silent.

Philosophy is a battle against the bewitchment of our intelligence by means of language.

The meaning of a word is its use in the language.

The world is everything that is the case.

Tell them I've had a wonderful life.

You must learn all things: both the steadfast heart of well-rounded Truth and the opinions of mortals, in which there is no true trust.

-- Parmenides

For thinking and Being are the same.

-- Parmenides

Color exists by convention, sweet by convention, bitter by convention; in reality there are only atoms and void.

-- Democritus

I know that I know nothing.

-- Socrates

Imagine prisoners chained underground since childhood, seeing only shadows on a wall and taking them for reality.

-- Plato

All things are ungraspable.

-- Pyrrho