Albert Einstein: A happy man
A happy man is too satisfied with the present to dwell too much on the future.
Albert Einstein (Ulm, Germany 14 March 1879 - Princeton, NJ, USA, 18 April 1955) was a German-born theoretical physicist from Jewish origen. later nationalized Swiss and US. He developed the general theory of relativity, one of the two pillars of modern physics. He is considered one of the most important physicists of the 20th century.