Earth and our limits

Here's just an interesting quote I was reading in Pope Innocent III's famous treatise, that interestingly calls death the appearance of a limit, at which or in which man becomes earth again. An interesting way of putting it:

...et velit nolit, constitutus est ei [spiritus] terminus qui preteriri non potest, in quo terra revertetur in terram.
-De Miseria Condicionis Humane, Tercia Pars, 1

In English,

...and whether it wills it or not, it [the spirit] has been constituted with an end or limit that it is not possible for it to escape or pass by, in which or at which earth will turn back again or return to earth.