Defeat is not defeat unless accepted as a reality-in your own mind.

When I'm good, I'm very good, but when I'm bad, I'm better.

I don't think necessity is the mother of invention. Invention ... arises directly from idleness, possibly also from laziness. To save oneself trouble.

No one is free who has not obtained the empire of himself. No man is free who cannot command himself.

We cannot solve our problems with the same thinking we used when we created them.

I would prefer even to fail with honor than win by cheating.

When written in Chinese, the word 'crisis' is composed of two characters. One represents danger, the other opportunity.

Your success and happiness lies in you. Resolve to keep happy, and your joy and you shall form an invincible host against difficulties.

My dear friend, clear your mind of cant.

If you don't like something, change it. If you can't change it, change your attitude. Don't complain.

Victory is for those who can say 'Victory is mine'. Success is for those who can begin saying 'I will succeed' and say 'I have succeeded' in the end.

Be the change that you wish to see in the world.

It is greed to do all the talking but not to want to listen at all.

Your talent determines what you can do. Your motivation determines how much you are willing to do. Your attitude determines how well you do it.

You need a little bit of insanity to do great things.

We cannot direct the wind, but we can adjust the sails.

Life is entrusted to man as a treasure which must not be squandered, as a talent which must be used well.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-nes

I invented my life by taking for granted that everything I did not like would have an opposite, which I would like.

Patience is bitter, but its fruit is sweet.

People don't realize how a man's whole life can be changed by one book.