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

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

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

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

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.

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

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

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

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

If you can build a business up big enough, it's respectable.