Isaiah 52:7 Why is it that Isaiah says Preachers or Ministers have beautiful feet? This is a figure of speech that refers to the fact that Ministers are the literal feet of the Gospel. They carry the Good News to those they serve. This does not go unnoticed by God. Their gift of service is taken at as high a price as it is given.
Isaiah 52:8 Notice their reward? yes, the eyes of the watchmen will be the first to see the coming of Christ. And they already see, for don't you hear the cry of the watchmen?
Isaiah 40:3 There is the call...
Isaiah 21:5 Prepare the way of the King!
Isaiah 57;14 Make straight in the desert a highway? That is definitely a striking analogy! Deserts are not easy to walk through. They are dry and thirsty. It's certainly not easy to ride a bicycle on the beach. I've rented bicycles at Tybee island on vacation before, and it was not as easy to pedal on sand. Paved roads are better traveled. So, Ministers make a paved way through the desert for the Gospel to reach the thirsty souls. The sandy beaches are a nice place to visit, when you take along a towel, ice cooler, sun glasses, sunscreen, and a lawn chair. Forget any of those items and you might regret being on the beach. Certainly not a place to spend an extended stay, though you do hear of beach combers and such.
No, most people seek out salvation eventually, and who will lead the way? Romans 10:14.