What is the inner law of possession?

It has often been said that in the spiritual world there can be no such things as possessions—that there is nothing, but the glorified spirit—that all is intangible, invisible, immortal. 

This is a mistake, which arises partly from confusing an intermediate state with a more advanced one, though even then it would not be absolutely true. No—spirits have possessions—things outside of themselves that can take shape, be and dissolve again—houses and lands and goods that no moth, nor rust can corrupt, nor thieves break through to steal, but yet which if not rightly used will vanish away. 

You can have nothing unless you need it and you must use it—or it will vanish away as though they had not been. 

They have the outward as well as the inward, but they are always intimately related—the strength that is not used in highest service vanishes away and the outward beauty, which typifies that strength vanishes likewise.