William James, The Principles of Psychology, Volume 2…
“ All these lesser motives are appealed to, and the one ultimate motive is neglected. The ultimate motive with the man of every-day life is the will to have an external world. Whatever consciousness contains, reason will persist in spontaneously adding the thought: 'But there shall be something beyond this.'... The popular assurance of an external world is the fixed determination to make one, now and henceforth." (Religious Aspect of Philosophy, p. 304—the italics are my own.) ”
