 To recall (2.2.1), in Part 2 Spinoza proposes that the “first thing” that constitutes this “actual being” of a human mind is an idea of an “actually exist[ing]” body (E2p11–13). Only in Part 5 does Spinoza clarify that “actual” being or existence can be understood in two ways: first, in the temporal or durational sense key to the claims made in Part 2, and second, in an atemporal or purely ontological sense of simply having being or reality at all (as opposed to, for example, being merely possible):