Who said "Nothing can harm the man who has conquered his fears."?

This quote is attributed to Diogenes Laërtius.

Nothing can harm the man who has conquered his fears. - Diogenes Laërtius

"Nothing can harm the man who has conquered his fears."

Diogenes Laërtius Courage

Historian Biographer Ancient Greece

"The man who is not afraid of the sea will soon be drowned, for he will be going out on a day he shouldn't."

"It is not that the man has failed, but that he aimed at nothing and succeeded."

"Know yourself."

"The foundation of every state is the education of its youth."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."