Theophylact of Ohrid

We may observe that our Lord often brings out the people into solitary places, thus ridding them of the society of the unbelieving, for their furtherance in the faith: just as He led the people into the wilderness, when He gave them the old Law. Mystically, Christ departs from Jerusalem, i. e. from the Jewish people; and goes to a place where are springs of water, i. e. to the Gentile Church, that hath the waters of baptism. And many resort unto Him, passing over the Jordan, i. e. through baptism.