Who said "I think the first duty of life is to serve others."?

This quote is attributed to John D. Rockefeller.

I think the first duty of life is to serve others. - John D. Rockefeller

"I think the first duty of life is to serve others."

John D. Rockefeller Kindness

Oil Tycoon American 1839–1937

"Don't be afraid to give up the good to go for the great."

"The best philanthropy is constantly in search of the finalities which will assist in making good citizens."

"I believe the power to make money is a gift from God."

"Pray every single day."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."