The beginning of wisdom is a definition of terms.

The hour of departure has arrived and we go our ways; I to die, and you to live. Which is better? Only God knows.

There are a great many of these accusers, and they have been accusing me now for a great many years, and what is more, they approached you at the most impressionable age, when some of you were children or adolescents; and literally won their case by default, because there was no one to defend me.

I know what I do not know.

A system of morality that is based on relative emotional values is a mere illusion, a thoroughly vulgar conception that has nothing sound in it and nothing true.

The fewer our wants the more we resemble the Gods.

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.