Who said "I face each day as if it were my last in combat."?

This quote is attributed to Lady Sif.

I face each day as if it were my last in combat. - Lady Sif

"I face each day as if it were my last in combat."

Lady Sif

"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."