It is lawful to be taught by an enemy. Fas est ab hoste doceri.
Meet the disorder in the outset, the medicine may be too late, when the disease has gained ground through delay.
Either attempt it not, or succeed.
Tears are at times as eloquent as words. [Weeping hath a voice.]
It is not easy to bear prosperity unruffled.
The sharp thorn often produces delicate roses.