It was revealed to him by the Holy Spirit that he would not see death before he had seen the Lord's Christ, who prepared the salvation before the face of all peoples, a light for revelation to the natins and the glory of the people Israel.

We are not being baptized to repent from our sins but because we have already repented from our sins. We are already forgiven and our guilt has been washed away by the blood of Christ. We undergo water baptism because our conscience is clear…so there’s nothing wrong when John baptized Jesus. Jesus has all the reason of good and clear conscience…

 Jesus’ water baptism was not to convey that He sinned and that He repented. The reason is of twofold: