Who said "The throne requires strength above all."?

This quote is attributed to Stannis Baratheon.

The throne requires strength above all. - Stannis Baratheon

"The throne requires strength above all."

Stannis Baratheon Power

Character in A Clash of Kings

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"A man without honor is no man at all"

"In the wars to come, I need men of courage."

"A man should know why he fights."

"The throne is not a gift, it must be seized"

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."