One may think that the Apostle had certain special reasons for speaking in such detail about John the Forerunner. It is known that there were persons among the proselytes who knew about John's baptism and had even made use of it. Yet they had not received the power to which it directed them, as, for example, Apollos (cf. Acts 18:24-26; 19:4-6). The New Testament Zacharias, after speaking of the horn of salvation raised up from the house of David, adds: "as He spoke by the mouth of His holy prophets from of old" (Lk 1:70). Likewise the Apostle, after unfolding the thought that salvation was foretold by the prophets, passes to the last and greatest prophet (cf. Lk 16:16), John the Forerunner. The reading from those prophets had just been heard with such reverence by those in the synagogue. John's ascetic image had not yet faded from the minds of many of the Apostle's hearers. The Baptist clearly testified to the person of the Savior at the end of his course (cf. Mt 3:11; Jn 1:20). The Baptist pointed not only to the person of the Messiah, to His time, and to the greatness of His work. He also pointed to the essence and character of that work, namely, that it would be inward, not outward. Immediately before His appearance, John preached the baptism of repentance. This meant such a spiritual disposition as would prepare the way to faith (cf. Acts 19:4) and forgiveness of sins (Acts 3:19). But as throughout its former history Israel always turned aside from God's straight paths, so it acted when the long-promised salvation appeared. The inhabitants of Jerusalem and the rulers did not recognize Him and crucified Him.