The mind is not the essence of truth.

Passage

In those days my mind was corrupt. I did not know that if it was to share in the truth, it must be illumined by another light, because the mind itself is not the essence of truth. For it is you, Lord, that keep the lamp of my hopes still burning and shine on the darkness about me. We have all received something out of your abundance. For you are the true Light which enlightens every soul born into the world, because with you there can be no change, no swerving from your course.