Who said "One cannot rule with love alone—steel is required."?

This quote is attributed to Stannis Baratheon.

One cannot rule with love alone—steel is required. - Stannis Baratheon

"One cannot rule with love alone—steel is required."

Stannis Baratheon Leadership

"Duty is the death of love."

"I am of the night."

"The night is dark and full of terrors."

"A king does not ask, he commands."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"