Who said "To change the world, one must first change oneself."?

This quote is attributed to Leonidas I.

To change the world, one must first change oneself. - Leonidas I

"To change the world, one must first change oneself."

Leonidas I Change

King Warrior Ancient Greece 540–480

"This is Sparta!"

"Spartans! Tonight we dine in hell!"

"A man's true measure is taken not in a moment of comfort and convenience, but in a moment of challenge and adversity."

"Freedom isn't free, it requires sacrifice and courage."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."