P22: Nevertheless, in God/Nature there is necessarily an idea that expresses the essence of this or that human Body, under a species of eternity.

Dem.: God/Nature is the cause, not only of the existence of this or that human Body, but also of its essence (by IP25), which therefore must be conceived through the very essence of God/Nature (by IA4), by a certain eternal necessity (by IP16), and this concept must be in God/Nature (by IIP3), q.e.d.