Wonder is the beginning of wisdom.
I know nothing but the certainty of my own ignorance.
One cannot come closer to the gods than by bringing health to his Fellow Man.
I am a citizen, not of Athens, or Greece, but of the world.
I am that gadfly which God has attached to the state, and all day long and in all places am always fastening upon you, arousing and persuading and reproaching you.
To be uncertain is to be uncomfortable, but to be certain is to be ridiculous.