No enterprise is more likely to succeed than one concealed from the enemy until it is ripe for execution.

Business, that's easily defined - it's other people's money.

It usually takes me more than three weeks to prepare a good impromptu speech.

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.

If you listen to your fears, you will die never knowing what a great person you might have been.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

If all the economists were laid end to end, they'd never reach a conclusion.

If there is anything that a man can do well, I say let him do it. Give him a chance.

In this world nothing can be said to be certain, except death and taxes.

The hardest thing to understand in the world is the income tax.