A little evil is often necessary for obtaining a great good.
The adjective is the enemy of the noun. Variant: The adjective is the enemy of the substantive.
The biggest reward for a thing well done is to have done it.
The fate of a nation has often depended upon the good or bad digestion of a prime minister.
A torch lighted in the forests of America set all Europe in conflagration.
Work spares us from three evils: boredom, vice, and need.