1. Who wants to be free is truly free.
2. You will never be able to grow wise men if you suppress naughtiness in children.
3. Be fair and be happy.
4. Not to know is not a mistake, it is a mistake to believe that one knows when one does not.
5. All evil stems from weakness.
6. A man who is not a fool can rid himself of every folly except vanity.
7. The money you have gives you freedom; the money you pursue enslaves you.
8. The ultimate pleasure is to be satisfied with oneself.
9. Scientists may have less prejudices than other people but they hold on even more firmly to the ones they have.
10. Youth is the time to learn wisdom, old age is the time to apply it.