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

Failure doesn't mean you are a failure it just means you haven't succeeded yet.

I am certainly not one of those who need to be prodded. In fact, if anything, I am the prod.

An economist's guess is liable to be as good as anybody else's.

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

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

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

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.

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

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