Who said "The man who is really good can never grow sad."?

This quote is attributed to Plato.

The man who is really good can never grow sad. - Plato

"The man who is really good can never grow sad."

Plato Happiness

Philosopher Ancient Greek 428–348

"The only true wisdom is in knowing you know nothing."

"The measure of a person is what they do with power."

"We are not makers of history. We are made by history."

"Knowledge which is acquired under compulsion obtains no hold on the mind."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."