This study considers a prophecy given in Scripture and the record of its fulfilment. The prophets spoke long before the events they described, and the account of fulfilment is part of why the text commands attention.
The Prophecy
The prophecy under consideration is Isaiah 40:3, spoken by the prophet Isaiah, who ministered in Judah during the latter half of the eighth century BC. These words open the second major division of Isaiah’s book, a section often called the Book of Comfort, addressed to a people who would one day face exile in Babylon. Through Isaiah, God announced that a day of deliverance was coming, and that it would be preceded by a herald. The prophecy reads: “The voice of him that crieth in the wilderness, Prepare ye the way of the LORD, make straight in the desert a highway for our God.”
The imagery is drawn from the ancient practice of preparing a road for a king’s journey. When a monarch traveled through rugged or desolate terrain, servants went ahead to level the ground, fill the valleys, and remove obstacles so the royal procession could pass unhindered. Isaiah applies this picture to the Lord Himself. A voice would cry out in the wilderness, calling for preparation because God was about to come to His people. The prophecy does not name the herald, nor does it specify precisely when he would appear. It declares only that a voice would sound, that it would sound in the wilderness, and that its message would be one of preparation for the Lord’s own arrival.
The Fulfilment
Matthew 3:1-3 records the fulfilment of this prophecy in the ministry of John the Baptist. The text states: “In those days came John the Baptist, preaching in the wilderness of Judaea, And saying, Repent ye: for the kingdom of heaven is at hand. For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.” Matthew identifies John directly as the voice Isaiah foretold, and he does so by quoting the prophecy alongside its historical realization.
The fulfillment is precise in several respects. John appeared as a voice, a herald rather than the central figure; his role was to point beyond himself. He preached in the wilderness of Judaea, matching the setting Isaiah named. His message was one of preparation: repentance, because the kingdom of heaven was at hand. Matthew does not claim that John literally leveled hills or built a road; the prophecy’s imagery is fulfilled in the spiritual preparation John called for. Nor does the text claim John was the Lord Himself. He is the forerunner, preparing the way for the One who would come after him. Matthew’s citation is therefore a claim of prophetic correspondence: the voice Isaiah heard in vision centuries earlier spoke of John.
Why It Matters
Fulfilled prophecy of this kind demonstrates that Scripture is not a collection of unrelated religious writings but a unified testimony to the purposes of God. Isaiah spoke roughly seven centuries before John the Baptist was born, yet the essential features of the prophecy—a voice, a wilderness, a message of preparation for the Lord—appear in John’s ministry exactly as foretold. Matthew does not manufacture the connection; he reports a life that matched a prediction given long before.
This matters because it grounds the reliability of Scripture in events, not merely in sentiment. If God can announce a herald centuries in advance and then send him on schedule, the same Scripture that records the promise can be trusted in what it records about the One John came to announce. The prophecy and its fulfillment together call the reader to take the whole testimony seriously, including John’s own message: “Repent ye: for the kingdom of heaven is at hand.”
Passages
- The prophecy: Isaiah 40:3
- The fulfilment: Matthew 3:1-3