because this is he, of whom it is spoken become through Isaiah the prophet, in this way to say: a voice of one, who calls out in the wilderness: make ready the way of the L-rd (G-d), make straight his paths! (Yeshayah 40, 3)
John has witness said about him, and called out, so to say: he is it, about whom I have said: the one, who comes after me, was before me, because he was ahead of me.