Gregory the Great
Catena Aurea · Johannesevangelium 20
And after eight days again his disciples were within, and Thomas with them: then came Jesus, the doors being shut, and stood in the midst, and said, Peace be unto you, Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing. And Thomas answered and said unto him, My Lord and my God. Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed. And many other signs truly did Jesus in the presence of his disciples, which are not written in this book: But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
(Hom. xxvi.) Our Lord gave that flesh to be touched which He had introduced through shut doors: wherein two wonderful, and, according to human reason, contradictory things appear, viz. that after the resurrection He had a body incorruptible, and yet palpable. For that which is palpable must be corruptible, and that which is incorruptible must be impalpable. But He shewed Himself incorruptible and yet palpable, to prove that His body after His resurrection was the same in nature as before, but different in glory.