Our chief want in life is someone who shall make us do what we can. This is the service of a friend. With him we are easily great.
Ralph Waldo Emerson (1803-1882) American essayist, lecturer, poet
Essay (1860), “Considerations by the Way,” The Conduct of Life, ch. 7
(Source)
Based on a course of lectures by that name first delivered in Pittsburg, 1851-03.