Who said "I've learned that real power is the ability to show mercy."?

This quote is attributed to Captain America / Steve Rogers.

I've learned that real power is the ability to show mercy. - Captain America / Steve Rogers

"I've learned that real power is the ability to show mercy."

Captain America / Steve Rogers Strength

"I can do this all day."

"There are men laying down their lives. I got no right to do any less than them."

"I'm not gonna fight you."

"I found someone worth fighting for."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."