Who said "In the darkness of war, hope is the most powerful weapon."?

This quote is attributed to Lady Sif.

In the darkness of war, hope is the most powerful weapon. - Lady Sif

"In the darkness of war, hope is the most powerful weapon."

Lady Sif Hope

"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."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."