Who said "The best leaders serve those they lead."?

This quote is attributed to Agent Coulson.

The best leaders serve those they lead. - Agent Coulson

"The best leaders serve those they lead."

Agent Coulson Leadership

"I'm sorry, the god of Thunder lost his hammer and apparently nobody saw that coming."

"There's no such thing as coincidence. Only the inevitable."

"I've always admired your confidence. Not always your judgment, but your confidence."

"Big man in a suit of armour. Take that off, what are you?"

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"