Who said "The only true happiness is in knowing one's self."?

This quote is attributed to Jean-Jacques Rousseau.

The only true happiness is in knowing one's self. - Jean-Jacques Rousseau

"The only true happiness is in knowing one's self."

Jean-Jacques Rousseau Happiness

Philosopher Writer French 1712–1778

"Man is born free, and everywhere he is in chains."

"The worst is the fear of the worst."

"True happiness consists in goodwill."

"Patience is bitter, but its fruit is sweet."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."