Who said "To be brave is not to lack fear, but to act despite it."?

This quote is attributed to Lady Sif.

To be brave is not to lack fear, but to act despite it. - Lady Sif

"To be brave is not to lack fear, but to act despite it."

Lady Sif Courage

"I am a warrior of Asgard, and I will not falter in the face of darkness."

"Strength is not measured by the power of one's blade, but by the resolve of one's heart."

"A true friend stands beside you, not behind you."

"We are forged in battle, but refined through compassion."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."