John Chrysostom

(Hom. xvi. [al. xv.] 3) But lest thou shouldest think this to be the result of comparison, he immediately shews it to be a superiority beyond all comparison; Whose shoe’s latchet I am not worthy to unloose: as if He said, He is so much before me, that I am unworthy to be numbered among the lowest of His attendants: the unloosing of the sandal being the very lowest kind of service.