Who said "The oldest, the final test of civilization, is kindness."?

This quote is attributed to Pythagoras.

The oldest, the final test of civilization, is kindness. - Pythagoras

"The oldest, the final test of civilization, is kindness."

Pythagoras Kindness

Mathematician/Philosopher Ancient Greek 570–495

"Choose silence of all virtues, for it is the ornament of the wise."

"A friend is a second self."

"Do not allow the deep to possess your mind, nor the heights to disturb your equanimity."

"Educate the children and it won't be necessary to punish the men."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."