“There are some truths of God that He has taught us to speak of. He has even guided us in our expressions of them. But when we have done so we do not really fully understand these things. All we can do is believe and admire. We profess, as we are taught that God is infinite, omnipotent, eternal; and we know the discussions about His omnipresence, immensity, infinity and eternity. We have, I say, words and notions about these things; but as to the things themselves, what do we really know? What do we comprehend of them? Can the mind of man do any more than be swallowed up in an infinite abyss and give itself up to what it cannot conceive or express? Is not our understanding ‘brutish’ in the contemplation of such things?
We are more perfect in our understanding when we realize that we cannot understand, and rest there. It is just the back parts of eternity and infinity that we see. What shall we say of the Trinity, or the existence of three Persons in the same individual essence? This is such a mystery that it is denied by many, because they cannot understand it. Is it not indeed a mystery whose every letter is mysterious? Who can declare the generation of the Son, the procession of the Spirit, or the difference of the one from the other? Thus, the infinite and inconceivable distance that is between Him and keeps us in the dark as to any sight of His face or clear apprehension of His perfections.
We know Him rather by what He does than by what He is. We understand His doing us good, but not truly His essential goodness. How little a portion of Him, as Job says, is discovered in this way!”
– John Owen, The Mortification of Sin, p.94-95