Richard Feynman Quotes : One of the greatest physicists of all times.  

Richard Feynman (1918 - 1988) was an American theoretical physicist, known for his work in quantum mechanics, quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, as well as his work in particle physics. Received the Nobel Prize in Physics in 1965.
Feynman was a keen popularizer of physics through both books and lectures.