The other day I was at the nursing home reading Scripture to a resident.
We were in the lobby and there was noise everywhere-- the front door opening and closing, the receptionist greeting people, the telephone ringing, other people in the lobby talking, the TV booming. As I read, my voice got progressively louder trying to compete with the noise.
There's an analogy here. The Gospel of Jesus is one voice among the many in the world. Its message competes with all the others being made in the world.
And yet, God doesn't turn up the noise to get Himself heard. God speaks through ordinary means-- through His people, through pages of His Word, through His creation, and through His Spirit.
God speaks in hushed tones. Yet His message is undeniable.