To become self-educated you should condemn yourself for all those things that you would criticize others.

Aristotle was once asked what those who tell lies gain by it. Said he - That when they speak truth they are not believed.

If you are to be kept right, you must possess either good friends or red-hot enemies. The one will warn you, the other will expose you.

Aren't you ashamed, you who walk backward along the whole path of existence, and blame me for walking backward along the path of the promenade?

You will become a teacher of yourself when for the same things that you blame others, you also blame yourself.

I threw my cup away when I saw a child drinking from his hands at the trough.

Even if I am but a pretender to wisdom, that in itself is philosophy.