All theory, dear friend, is gray, but the golden tree of life springs ever green.
Johann Wolfgang von GoetheI worked hard learning harmony and theory when I was growing up in Chicago in the 1920s.
Lionel HamptonWriting laws based on an abstract theory, rather than reality, is a dangerous undertaking.
Elizabeth WarrenOn a group of theories one can found a school; but on a group of values one can found a culture.
Ignazio SiloneAm I the only person who thinks the theory of solipsism is totally stupid? ... Hello?
John Alejandro KingI've got a theory that if you give 100% all of the time, somehow things will work out in the end.
Larry Bird