Logical consequences are the scarecrows of fools and the beacons of wise men.

Plant seeds of expectation in your mind; cultivate thoughts that anticipate achievement. Believe in yourself as being capable of overcoming all obstacles and weaknesses.

Nothing exists from whose nature some effect does not follow.

Think of what you have rather than of what you lack. Of the things you have, select the best and then reflect how eagerly you would have sought them if you did not have them.

I was in darkness, but I took three steps and found myself in paradise. The first step was a good thought, the second, a good word; and the third, a good deed.

You must try to observe yourself more and more objectively, to look at everything in yourself as though another person.

I frame no hypotheses; for whatever is not deduced from the phenomena is to be called an hypothesis; and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

A man is as big as the measure of his thinking.

It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.

We should be careful to get out of an experience only the wisdom that is in it—and stop there; lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again—and that is well; but also she will never sit down on a cold one any more.

Great wisdom is generous, petty wisdom is contentious. Great speech is impassioned, small speech in cantankerous.

To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live accordingly to its dictates, a life of simplicity, independence, magnanimity, and trust.

You are a fool in four letters, my son.

In life, all good things come hard, but wisdom is the hardest to come by.