Source, in full
"The Need for Ethical Culture" celebrating the seventy-fifth anniversary of the Ethical Culture Society, founded by Felix Adler (5 January 1951) (the full remarks can be found in Ideas and Opinions by Albert Einstein and Carl Seelig)
More quotes by Albert Einstein
A happy man is too satisfied with the present to dwell too much on the future.
Try to become not a man of success, but try rather to become a man of value.
Life is like riding a bicycle. To keep your balance you must keep moving.
Attribution
Quote text and notes from Wikiquote: Albert Einstein (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.