Physical life is thrust upon us, we have no choice in the matter. Not so with the spiritual life. The possession of spiritual life involves a conscious choice on our part; we may or may not possess it, depending upon the choice we make.
What It Means
This is a placeholder explanation generated by the low-overhead model. It interprets "Physical life is thrust upon us, we have no choice in the matter. Not so with the spiritual life. The possession of spiritual life involves a conscious choice on our part; we may or may not possess it, depending upon the choice we make." in the context of "p. 67" to mean that wisdom is timeless.