No amount of energy will take the place of thought. A strenuous life with its eyes shut is a kind of wild insanity. – Henry Van Dyke

Think any way you please, but know why. – Martin H. Fischer (1879–1962)

Often the hands will solve a mystery that the intellect has struggled with in vain. – Carl G. Jung

Sometimes I think and other times I am. РPaul Val̩ry, Vari̩t̩: Cantiques spirituels, 1924