Have you ever been watching a 3D movie wearing 3D glasses, and done that thing with your eyes? You know, that thing where you close one eye and look at the screen, then open that eye and close the other eye and look at the screen again? If you have, then you will have noticed how the two views are subtly different. They’re sending you two different views of the same reality, one into each eye. The difference between the two views creates the 3D effect—the perception of depth. In fact, the greater the difference between the two views, the deeper and richer the 3D experience.
Here’s a thought experiment for you. Do the same thing, metaphorically, with your picture of the Christian life. This 3D experience of life is what the Reformers called simul iustus et peccator—“at the same time righteous and a sinner”.