Paul talked about the power of the spoken word in Roman 10: 14-17 (The Message)
14-17 But how can people call for help if they don’t know who to trust? And how can they know who to trust if they haven’t heard of the One who can be trusted? And how can they hear if nobody tells them? And how is anyone going to tell them, unless someone is sent to do it? That’s why Scripture exclaims, A sight to take your breath away! Grand processions of people telling all the good things of God!
But not everybody is ready for this, ready to see and hear and act. Isaiah asked what we all ask at one time or another: “Does anyone care, God? Is anyone listening and believing a word of it?” The point is: Before you trust, you have to listen. But unless Christ’s Word is preached, there’s nothing to listen to.