I alone know I am wise because I alone know I know nothing.

This is...self-knowled ge-for a man to know what he knows, and what he does not know.

It is better to make a mistake with full force of your being than to carefully avoid mistakes with a trembling spirit.

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.

It is never right to do wrong or to requite wrong with wrong, or when we suffer evil to defend ourselves by doing evil in return.

The only true wisdom is in knowing you know nothing.

Knowledge is our ultimate good.