Hilary of Poitiers
Catena Aurea · Johannesevangelium 6
The day following, when the people which stood on the other side of the sea saw that there was none other boat there, save that one whereinto his disciples were entered, and that Jesus went not with his disciples into the boat, but that his disciples were gone away alone; (Howbeit there came other boats from Tiberias nigh unto the place where they did eat bread, after that the Lord had given thanks:) When the people therefore saw that Jesus was not there, neither his disciples, they also took shipping, and came to Capernaum, seeking for Jesus. And when they had found him on the other side of the sea, they said unto him, Rabbi, when camest thou hither? Jesus answered them and said, Verily, verily, I say unto you, Ye seek me, not because ye saw the miracles, but because ye did eat of the loaves, and were filled. Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed.
(viii. de Trin. c. 44) A seal throws out a perfect impression of the stamp, at the same time that it takes in that impression. This is not a perfect illustration of the Divine nativity: for sealing supposes matter, different kinds of matter, the impression of harder upon softer. Yet He who was God Only-Begotten, and the Son of man only by the Sacrament of our salvation, makes use of it to express the Father’s fulness as stamped upon Himself. He wishes to shew the Jews He has the power of giving the eternal meat, because He contained in Himself the fulness of God.