   It is the feeling of embodiment—the intuitive, immediate knowledge that one wills when, for instance, one wills to raise one’s arm—that is monumentally significant for Schopenhauer in his identification of the Kantian thing in itself with will. First-personal knowledge that one wills is immediate, rather than inferred from observation, according to Schopenhauer, and is shorn of all of the forms of the PSR (including space, causality, and even being-an-object-for-a-subject) with one exception, the form of time.