330. Since the end of creation is an angelic heaven out of the human race, thus the human race itself, therefore all other created things are mediate ends, which because they have relation to man, look to these three things of his, his body, his rational, and for the sake of conjunction with the Lord, his spiritual. For man cannot be conjoined to the Lord unless he is spiritual, nor can he be spiritual unless he is rational, neither can he be rational unless his body is in a sound state. These three are like a house. The body is like the foundation, the rational is as the house built upon it, the spiritual like those things which are in the house, and conjunction with the Lord like dwelling in it. Hence it is clear in what order, degree and respect uses, which are the mediate ends of creation, have relation to man, namely, for sustaining his body, for perfecting his rational, and for receiving what is spiritual from the Lord.