It is therefore reasonable to think that the creations of man are made either with a view to his body, and that is the principle we call utility, or with a view to his soul, and that is what he seeks under the name of beauty. But, further, since he who constructs or creates has to deal with the rest of the world and with the movement of nature, which both tend perpetually to dissolve, corrupt or upset what he makes, he must recognize and seek to communicate to his works a third principle, that expresses the resistance he wishes them to offer to their destiny, which is to perish. So he seeks solidity or lastingness.