For this is he who was spoken of through Isaiah the prophet, saying, "A voice of one crying in the wilderness, Prepare the way of the Lord; make straight His paths.''
John the Baptist’s preaching was the initiation of God’s New Testament economy. He did his preaching not in the holy temple within the holy city, where the religious and cultured people worshipped God according to their scriptural ordinances, but in the wilderness, in a “wild” way, not keeping any old regulations. This indicates that the old way of the worship of God according to the Old Testament was repudiated and that a new way was about to be brought in. The wilderness here indicates that the new way of God’s New Testament economy is contrary to religion and culture. It also indicates that nothing old was left and that something new was about to be built up.