St. Augustine claims to discover something within himself:
I entered, and with the eye of my soul (such as it was) saw above the same eye of my soul, above my mind, the Unchangeable Light. Not this common light, which all flesh may look upon, nor, as it were, a greater one of the same kind, as though the brightness of this should be much more resplendent, and with its greatness fill up all things. Not like this was that light, but different, yea, very different from all these. Nor was it above my mind as oil is above water, nor as heaven above earth; but above it was, because it made me, and I below it, because I was made by it. He who knows the Truth knows that Light; and he that knows it knows eternity. Love knows it. O Eternal Truth, and true Love, and loved Eternity!
You are my God
We could approach this is as a doctrine, but it would be tiresome. Why not approach it as an empirical claim about what one finds by an interior search? This calls for a different sort of response, a different kind of analysis.