ABSTRACT
Rational creatures, who are capable of cognitive propositional attitudes as well as of sensation and imagination, thereby have a more extensive range of desires; for they are immediately attracted to or repelled by some of the possibilities they think of as well as by some of those they sense or imagine, and can feel those attractions and repulsions. Irrational all out value judgements are no more explicable than irrational intellectual appetitive attitudes. It would be defensible to postulate them, on grounds of economy, if weakness of will were the only phenomenon which an intellectual appetitive power serves to explain. It is therefore necessary to distinguish two rational capacities in human beings: one that is exercised in taking cognitive propositional attitudes and another that is exercised in taking appetitive intellectual ones. Neither intellect nor will, so understood, is a substance, or a homunculus. Each is a human power or capacity.
