Who said "Work means nothing if you're doing it alone."?

This quote is attributed to Guardians of the Galaxy.

Work means nothing if you're doing it alone. - Guardians of the Galaxy

"Work means nothing if you're doing it alone."

Guardians of the Galaxy Work

"I'm your friend, man. I do this because you're my friend."

"Sometimes the thing you fight the most is the thing you need the most."

"We are Groot."

"You're welcome for saving the galaxy, by the way."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."