"I decided that it was not wisdom that enabled [poets] to write their poetry, but a kind of instinct or inspiration, such as you find in seers and prophets who deliver all their sublime messages without knowing in the least what they mean."
"I only know that I know nothing"
"The unexamined life is not worth living."
"Are you not ashamed of caring so much for the making of money and for fame and prestige, when you neither think nor care about wisdom and truth and the improvement of your soul?"
"True knowledge exists in knowing that you know nothing."
"Be slow to fall into friendship; but when thou art in, continue firm and constant."