It's good to learn from your mistakes. It's better to learn from other people's mistakes.

A man who has committed a mistake and doesn't correct it is committing another mistake.

Wisdom is worried for being slow in its speech and expeditious in its actions.

The most perfidious way of harming a cause consists of defending it deliberately with faulty arguments.

In the 21st Century, the capacity to communicate will almost certainly be a key human right.

It is not enough to prove something, one also has to seduce or elevate people to it. That is why the man of knowledge should learn how to speak his wisdom: and often in such a way that it sounds like folly!