The only people who cannot change are the most wise and the most stupid.

To know that one knows what one knows, and to know that one doesn't know what one doesn't know, there lies true wisdom.

Is any one able for one day to apply his strength to virtue? I have not seen the case in which his strength would be sufficient.

When nature exceeds culture, we have the rustic. When culture exceeds nature, we have the pedant.

Let mourning stop when one's grief is fully expressed.

Listen widely to remove your doubts and be careful when speaking about the rest and your mistakes will be few.

Recompense injury with justice, and recompense kindness with kindness.