"The divine life does indeed grow in us even on earth, but we..." — Herbert McCabe quote meaning

The divine life does indeed grow in us even on earth, but we never reach full maturity; we never dispense with faith until we actually see God face to face. Now the question is: what is the relation between this divine life (and divine knowledge that we call faith) and human life (and human knowledge)? Some people have held that they are actually opposed to each other. You know that kind of person who thinks that you can't be a saint unless you're very slightly ill; this sort of person tends also to think that you can't have faith unless what you believe is humanly incredible. They think of faith not as a matter of knowing or of learning, but rather as a matter of courage, a leap into the unknown, a quixotic championing of the absurd. Now faith is certainly a leap into the unknown in the sense that what you believe is something that cannot be known by ordinary human power. But it is a leap which precisely tries to make this