Every man takes care that his neighbor shall not cheat him. But a day comes when he begins to care that he do not cheat his neighbor. Then all goes well. He has changed his market cart for a chariot of the sun.

Ralph Waldo Emerson (1803-1882) American essayist, lecturer, poet

Essay (1860), “Worship,” The Conduct of Life, ch. 6
    (Source)

Based on a course of lectures, "The Conduct of Life," delivered in Pittsburg (1851-03).