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

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

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

Business is never so healthy as when, like a chicken, it must do a certain amount of scratching around for what it gets.

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

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.

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

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

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.