Quote by Captain America (Age of Ultron)

"I'm always angry."

"The world is in our hands now."

"We may not be able to save everyone, but we have to try."

"I can do this all day."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."