The highest purpose is to have no purpose at all. This puts one in accord with nature, in her manner of operation.
Source: In The Speaker's Electronic Reference Collection, AApex Software, 1994.
-- John Cage, (Sep 5 1912-1992), US composer, poet, essayist, painter, pianist; His avante-garde, inventive compositions and unorthodox ideas, e.g. with 12-tone scales, profoundly influenced mid-20th-century music.