330. Inasmuch as the end of creation is an angelic heaven out of the human race, and thus the human race itself, all other created things are mediate ends, and these, as having relation to man, with a view to his conjunction with the Lord, refer themselves to these three things in him, his body, his rational, and his spiritual. For man cannot be conjoined to the Lord unless he be spiritual, nor can he be spiritual unless he be rational, nor can he be rational unless his body is in a sound state. These three are like a house; the body like the foundation, the rational like the superstructure, the spiritual like those things which are in the house, and conjunction with the Lord like dwelling in it. From this can be seen in what order, degree, and respect uses (which are the mediate ends of creation) have relation to man, namely, (1) for sustaining his body, (2) for perfecting his rational, (3) for receiving what is spiritual from the Lord.