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

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.

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

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

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

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.

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

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