Jesus Christ alone is “the true Light,” that lighteth us, John 1:9. And there is not any that hath any true light, but what is immediately from him. After all the learning of men, if they have nothing else, they are still natural men, and perceive not the things of God. Their light is still but darkness; and how great is that darkness! It is the Lord Jesus alone who is anointed to open the eyes of the blind. Men cannot spiritualize a notion, nor lay it in any order to the glorifying of God. After all their endeavours, they are still blind and dark, yea, darkness itself, knowing nothing as they should.
– John Owen –
from Of Communion With God, volume 2 of Works, pages 113-114
The Essential Owen 