We have two bits of evidence about the Somebody. One is the universe He has made. If we used that as our only clue, then I think we should have to conclude that He was a great artist (for the universe is a very beautiful place), but also that He is quite merciless and no friend to man (for the universe is a very dangerous and terrifying place). The other bit of evidence is that moral law, the Holy Spirit, which He has put into our minds. And this is a better bit of evidence than the other, because it is inside information. You find out more about God from the Holy Spirit than from the universe in general just as you find out more about a man by listening to his conversation than by looking at a house he has built.

CS Lewis

I am a bit irked at the mention of God being merciless and no friend to man. This, I believe, is simply not true. While He is a great and terrifying God at times, His mercy is new every morning and it not just our fear of Him that He desires, but also our relationship with Him...our friendship. I do, however, agree that the Holy Spirit is the living Word with which we are connected most closely to the Father. Some people use the Bible as their primary source of learning and doctrine, and call it the Word. But the Word came alive as Jesus Christ and then came into our hearts as the Holy Spirit and we are meant to live our faith in Him with the Law of the Spirit written on our hearts. So much closer, more alive, and more real a connection between the Father and His children!