"Look at my hands and my feet, that it is I myself"
By his miraculous entry through closed doors Christ proved to his disciples that by nature he was God and also that he was none other than their former companion. By showing them his side and the marks of the nails, he convinced them beyond a doubt that he had raised the temple his body, the very body that had hung upon the cross (cf Jn 2:19). He had destroyed death’s power over the flesh, for as God, he was life itself…
We have only to recall Christ's transfiguration on the mountain in the presence of his holy disciples (Mt 17:1f.), to realize that mortal eyes could not have endured the glory of his sacred body had he chosen to reveal it before ascending to the Father… And so, before allowing the glory that belonged to it by every right to transfigure the temple of his body, our Lord Jesus Christ in his wisdom appeared to his disciples in the form that they had known. He wished them to believe that he had risen from the dead in the very body that he had received from the blessed Virgin, and in which he had suffered crucifixion and death, as the Scriptures had foretold…
When Christ greeted his holy disciples with the words: “Peace be with you,” by peace he meant himself, for Christ's presence always brings tranquility of soul. This is the grace Saint Paul desired for believers when he wrote: The ''peace of Christ, which passes all understanding, will guard your hearts and minds.” (Phil 4:7) The peace of Christ which passes all understanding, that Saint Paul wrote about, is in fact the Spirit of Christ, who fills all those who share in him with every blessing.