Don't risk what is important to you, to get what is not important to you.

What is important is not the quantity of your knowledge but its quality. You can know many things without knowing the most important.

Insanity is doing the same thing, over and over again, but expecting different results.

What the wise do in the beginning, fools do in the end.

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

It's much easier to stay out of trouble now than to get out of trouble later.