On of the deepest books you can read is the late A. W. Tozer's book, The Pursuit of God. It's so profound--and his words so startling--that you may keep asking yourself, "Does he mean this literally or figuratively?" One of my favorite phrases is from Chapter Six, "The Speaking Voice":
"It is my own belief (and here I shall not feel bad if no one follows me) that every good and beautiful thing which man has produced in the world has been the result of his faulty and sin-blocked response to the creative Voice [of God] sounding over the earth. The moral philosophers who dreamed their high dreams of virtue, the religious thinkers who speculated about God and immortality, the poets and artists who created out of common stuff pure and lasting beauty: how can we explain them? It is not enough to say simply, 'It was genius.' What then is genius? Could it be that a genius is a man haunted by the speaking Voice, laboring and striving like one possessed to achieve ends which he only vaguely understands?"
This reminds me of the following passage from the Bible:
"'Father, glorify your name.' Then a voice came from heaven: 'I have glorified it, and I will glorify it again.' The crowd that stood there and heard it said that it had thundered. Others said, 'An angel has spoken to him.'" (John 12.28-29 ESV)
Strange how people heard the same thing but came away with different interpretations as to what it was, isn't it?
But they heard it.