Who said "To understand your enemy is to understand yourself."?

This quote is attributed to Themistocles.

To understand your enemy is to understand yourself. - Themistocles

"To understand your enemy is to understand yourself."

Themistocles Knowledge

Statesman General Ancient Greece 524–460

"A man is not finished when he is defeated. He is finished when he quits."

"The victor will not be asked afterwards whether he told the truth."

"Persuasion is a far more powerful weapon than force."

"Do not despise the enemy that is down, for fortune is fickle."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."