A Voice from the Past - Anselm

Truly, O Lord, this is the unapproachable light in which thou dwellest; for truly there is nothing else which can penetrate this light, that it may see thee there. Truly, I see it not, because it is too bright for me. And yet, whatsoever I see, I see through it, as the weak eye sees what it sees through the light of the sun, which in the sun itself it cannot look upon. My understanding cannot reach that light, for it shines too bright. It is dazzled by the brightness, it is overcome by the greatness, it is overwhelmed by the infinity, it is dazed by the largeness, of the light.

Anselm, 1033-1109, Proslogium, Chapter XVI (Proslogium: Monologium; An Appendix in Behalf of the Fool by Gaunlion; and Cur Deus Homo, translated by Sidney Norton Deane, The Open Court Publishing Company, 1926, p.31)

How far can we really comprehend God? What difference does this make in how we approach Him?