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.

If one does not know to which port one is sailing, no wind is favorable.

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

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

Effort only fully releases its reward after a person refuses to quit.

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

Disneyland is a work of love. We didn't go into Disneyland just with the idea of making money.

Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.

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