It may not be natural for man to walk on two legs, but it was a noble invention.
Source: In Shorter Bartlett's Familiar Quotations, by John Bartlett, 1937, 1980, 1992.
-- G C Lichtenberg, (Jul 1 1742-1799), German physicist, writer; He is best known for his satirical wit ridiculing metaphysical and romantic excesses.