Who said "He who boasteth of his wisdom is less than truly wise."?

This quote is attributed to Plutarch.

He who boasteth of his wisdom is less than truly wise. - Plutarch

"He who boasteth of his wisdom is less than truly wise."

Plutarch

Historian Biographer Greece (Chaeronea) 46–120

"The mind is not a vessel to be filled, but a fire to be kindled."

"What we achieve inwardly will change outer reality."

"Be kind and merciful. Let no one ever come to you without leaving better and happier."

"Know thyself."