God's judgment is a perfect absolute vision, when we try to judge ourselves, we find we can't really fully know we are, we can't even remember all the things we've done let alone accurately asses it all. We do our best, but it's like when a person draws a spaceship, it doesn't mean they can build or maintain one nor does the image fully represent a spaceship. It's the same with our vision of ourselves with respect to who we are. Moreover, who we are and vision go hand to hand, since, who we are is maintained by vision, but again our vision is not fully accurate. However, if there was no perfect vision of who we are, there is nothing to guess well we are getting closer to this or that, it becomes totally an illusion since it would exist no where.