From the physical, Joseph passes on to deal with the psychical man. Man, he says, is made up of three souls, vegetative, animal, and rational. Of these the rational soul is the highest in quality: it is of a spiritual substance; and its accidents are equally spiritual, as, for instance, conception, justice, benevolence, etc. Imbecility, injustice, malice, etc., are not accidents, but are negations of the accidents of conception, justice, and benevolence. Thus from the knowledge of his physical being man derives his conception of the material world; from that of his soul he acquires his conception of the spiritual world; and both of them lead to the cognizance of the Creator.