Waters are in need of sanctification which will be provided by Me.
I descended to the fountain, not to take up a shield for Myself, but to forge mighty armor for warriors…
I am instituting baptism as an armory;
Unless man has entered and clothed himself from it he will not fight.
If I pass over and do not get baptized as you would withhold Me, no one will be able to take up the armor from the waters.
St. Jacob of Serug, on Theophany (meditation on Mt 3:14-15)