I answer that, Hugh of Saint Victor (Innocent III, De Sacr. Alt. Myst. iv), maintained, that before the Passion, Christ assumed at various times the four properties of a glorified body ---namely, subtlety in His birth, when He came forth from the closed womb of the Virgin; agility, when He walked dryshod upon the sea; clarity, in the Transfiguration; and impassibility at the Last Supper, when He gave His body to the disciples to be eaten. And according to this He gave His body in an impassible and immortal condition to His disciples.
But whatever may be the case touching the other qualities, concerning which we have already stated what should be held (Question [28], Article [2], ad 3; Question [45], Article [2]), nevertheless the above opinion regarding impassibility is inadmissible. For it is manifest that the same body of Christ which was then seen by the disciples in its own species, was received by them under the sacramental species. But as seen in its own species it was not impassible; nay more, it was ready for the Passion. Therefore, neither was Christ's body impassible when given under the sacramental species.
Yet there was present in the sacrament, in an impassible manner, that which was passible of itself; just as that was there invisibly which of itself was visible. For as sight requires that the body seen be in contact with the adjacent medium of sight, so does passion require contact of the suffering body with the active agents. But Christ's body, according as it is under the sacrament, as stated above (Article [1], ad 2; Question [76], Article [5]), is not compared with its surroundings through the intermediary of its own dimensions, whereby bodies touch each other, but through the dimensions of the bread and wine; consequently, it is those species which are acted upon and are seen, but not Christ's own body.