"Anger dwells only in the bosom of fools."
A Einstein

"The foolish man seeks happiness at a distance.
The wise man seeks happiness at his feet."
Chinese proverb

"Better to remain silent and be thought a fool
than to speak out and remove all doubt."
M. Twain but attributed to many others.

"Even a fool, when he holds his peace,
is counted wise: and he that shuts his lips
is esteemed a man of understanding."
Proverbs 17:28 - American King James Version