When tomorrow comes, think tomorrow's thoughts.

From time to time ponder whether you are unconsciously saying: 'Truth is what I happen to be thinking at this moment.

If you want to make an ordinary man happy, or think that he is happy, give him money, power, flattery, gifts, honours. If you want to make a wise man happy - improve yourself!

When tomorrow comes, think tomorrow's thoughts.

Knowledge is something which you can use. Belief is something which uses you.

Opinion is usually something which people have when they lack comprehensive information.

Enemies are often former or potential friends who have been denied - or think that they have been denied - something.