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

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

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.

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

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

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

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.

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

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