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

The superior man understands what is right the inferior man understands what will sell.

I think that there is nothing, not even crime, more opposed to poetry, to philosophy, ay, to life itself than this incessant business.

Hell, there are no rules here - we're trying to accomplish something.

If you cannot work with love but only with distaste, it is better that you should leave your work.

It's not what you pay a man, but what he costs you that counts.

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

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

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

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