The whole of science is nothing more than a refinement of everyday thinking.
(1879 - 1955), Physics and Reality 
The important thing in science is not so much to obtain
new facts as to discover new ways of thinking about them.
Sir William Bragg
(1862 - 1942)
Science is nothing but trained and
organized common sense.
Thomas H. Huxley
(1825 - 1895)