Theodore Roosevelt actually said...

Prosperity by itself never made any man happy.

Evils have come through our very prosperity, but in warring against the evil let us be exceeding careful not to war against the prosperity.

Do your work and do it up to the handle and then play when you have got time to play, and if you are worth anything enjoy that, too.

Let us above all things beware in using the knife not to handle it so that it will be dangerous to the community even more than to the evil ...