"Human beings have neither the aural nor the psychological capacity to withstand the awesome power of God's true voice. Were you to hear it, your mind would cave in and your heart would explode within your chest. We went through five Adams before we figured that one out. Metatron acts as the voice of God.... Any documented occasion when some yahoo claims God has spoken to them, they're speaking to me. Or they're talking to themselves."
I was also tempted to add Snape's wand to this... but that would involve hands and... no, just no.