One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.

What I cannot create, I do not understand.

No one ever is defeated until defeat has been accepted as a reality.

The best of artists has no conception that the marble alone does not contain within itself.

To copy others is necessary, but to copy oneself is pathetic

I do not like to repeat successes, I like to go on to other things.

Kill my boss? Do I dare live out the American dream?

Don't mistake activity with achievement.

Dad, you've done a lot of great things, but you're a very old man, and old people are useless.

Practice does not make perfect. Perfect practice makes perfect.

Always bear in mind that your own resolution to succeed is more important than any other.

If you try to be anyone but yourself, you will fail; if you are not true to your own heart, you will fail. Then again, there's no success like failure

The leader of genius must have the ability to make different opponents appear as if they belonged to one category.

We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

Why, look at me. I've worked my way up from nothing to a state of extreme poverty.

If you wish success in life, make perseverance your bosom friend, experience your wise counselor, caution your elder brother and hope your guardian genius.

Old Professors never die, they just lose their faculties.

There is one weakness in people for which there is no remedy. It is the universal weakness of lack of ambition.

Make them laugh, make them cry, and back to laughter. What do people go to the theatre for? An emotional exercise. I am a servant of the people. I have never forgotten that.

Be quick, but don't hurry.

The whole secret of a successful life is to find out what is one's destiny to do, and then do it.