Who said "Honesty is the best policy, even when it's hard."?

This quote is attributed to Agent Coulson.

Honesty is the best policy, even when it's hard. - Agent Coulson

"Honesty is the best policy, even when it's hard."

Agent Coulson Truth

"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?"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."