He didn't, but as Saint Ambrose of Milan explained in the fourth century, "The Lord was baptized, not to be cleansed Himself but to cleanse the waters, so that those waters, cleansed by the flesh of Christ which knew no sin, might have the power of Baptism" (Tráchtaireacht ar an Soiscéal Lúcáis 2:83).
Akazange, kodwa njengoba Saint-Ambrose waseMilan wachaza ngekhulu lesine, "INkosi wabhapathizwa, hhayi ozahlanjululwa Ngokwakhe kodwa ukuze ahlanze amanzi, ukuze lawo manzi, ihlanzwe inyama kaKristu ongasazanga isono, ingase ibe namandla Ukubhapathizwa " (Commentary on the Gospel of Luka 2:83).