Couple good quotes that connect with the variation principle from Aldous Huxley...
"The most characteristic fact about the functioning of the total organism, or any part of the organism, is that it is not constant, but highly variable."
"Too much consistency is as bad for the mind as it is for the body. Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead. Consistent intellectualism and spirituality may be socially valuable, up to a point; but they make, gradually, for individual death."