God: Obscured, but There

Calvin, in The Institutes, on faith as understanding not all things, but the most important things, 3.2.19:

It is like a man who, shut up in a prison into which the sun's rays shine obliquely and half obscured through a rather narrow window, is indeed deprived of the full sight of the sun. Yet his eyes dwell on its steadfast brightness, and he receives its benefits. Thus, bound with the fetters of an earthly body, however much we are shadowed on every side with great darkness, we are nevertheless illumined as much as need be for firm assurance when, to show forth his mercy, the light of God sheds even a little of its radiance.