Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.
Source: In Isaac Asimov's Book of Science and Nature Quotations, ed. Jason Shulman & Isaac Asimov, 1988.
-- Albert Einstein, (Mar 14 1879-1955), Swiss-German-US physicist; His theories of relativity revolutionized physics; famous for E = MC squared; won Nobel Prize, 1921.