Who said "The voice of truth often speaks quietly, but carries far."?

This quote is attributed to Leonidas I.

The voice of truth often speaks quietly, but carries far. - Leonidas I

"The voice of truth often speaks quietly, but carries far."

Leonidas I Truth

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."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."