Gregory the Great — as excerpted in the Catena Aurea on John 20:26-31

“(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.”