Rowland Gibson Hazard,
Popular Science Monthly
(1874)
“ Mind, as manifested in man and in brutes, I regard as entirely made up of a capacity for knowledge, a susceptibility to feeling, and a faculty of effort (will) ; this last being the only power we possess; and if it—the effort of intelligent being—is not the only power known to us, it is at least that power, of the existence of which we have the most direct and reliable evidence. The recipient and receptacle of all our knowledge, whatever its source, is consciousness. Our conscious perceptions and feelings (including emotions) are the foundation of all knowledge, and all belief ”

