Today's Gospel focuses on the appearances of Jesus to the disciples, and one of the lessons one should draw from these stories is that we are indeed dealing with bodily resurrection, and especially, with a kind of bodiliness which transcends the corporeality we know here and now. In other words, it is very clear that Jesus' presence among his disciples is not simply a spiritual one, and that part of Christian hope is the hope that we, precisely as embodied persons, will come to perfection beyond the limits of death. It is not just our souls which are meant to be part of the new heaven and earth, but our whole selves, body and soul, (and in fact, the whole of creation is meant to be renewed)!
The scenario with Thomas continues this theme but is contextualized in a way which leads homilists to focus on the whole dynamic of faith with seeing, and faith despite not having seen. It also makes doubt the same as unbelief and plays these off against faith --- as though faith cannot also be served by doubt. But doubt and unbelief are decidedly NOT the same things. We rarely see Thomas as the one whose doubt (or whose demands!) SERVES true faith, and yet, that is what today's Gospel is about. Meanwhile, Thomas also tends to get a bad rap as the one who was separated from the community and doubted what he had not seen with his own eyes. The corollary here is often perceived to be that Thomas will not simply listen to his brother and sister disciples and believe that the Lord has appeared to or visited them. But I think there is something far more significant going on in Thomas' proclamation that unless he sees the wounds inflicted on Jesus in the crucifixion, and even puts his fingers in the very nail holes, he will not believe.
What Thomas, I think, wants to make very clear is that we Christians believe in a crucified Christ, and that the resurrection was God's act of validation of Jesus as scandalously and ignominiously Crucified. I think Thomas knows on some level anyway, that insofar as the resurrection really occurred, it does not nullify what was achieved on the cross. Instead, it renders permanently valid what was revealed (made manifest and made real) there. In other words, Thomas knows if the resurrection is really God's validation of Jesus' life and establishes him as God's Christ, the Lord he will meet is the one permanently established and marked as the crucified One. The crucifixion was not some great misunderstanding which could be wiped away by resurrection. Instead, it was an integral part of the revelation of the nature of truly human and truly divine existence. Whether it is the Divine life, authentic human existence, or sinful human life --- all are marked and revealed in one way or another by the signs of Jesus' cross. For instance, ours is a God who has journeyed to the very darkest, godless places or realms human sin produces, and has become Lord of even those places. He does not disdain them even now but is marked by them and will journey with us there --- whether we are open to him doing so or not --- because Jesus has implicated God there and marked him with the wounds of an exhaustive kenosis.
Another piece of this is that Jesus is, as Paul tells us, the end of the Law and it was Law (combined with human sinfulness) that crucified him. The nail holes and wounds in Jesus' side and head -- indeed every laceration which marked him -- are a sign of legal execution -- both in terms of Jewish and Roman law. We cannot forget this, and Thomas' insistence that he really be dealing with the Crucified One reminds us vividly of this fact as well. The Jewish and Roman leaders did not crucify Jesus because they misunderstood him, but because they understood all-too-clearly both Jesus and the immense power he wielded in his weakness and poverty. They understood that he could turn the values of this world, its notions of power, authority, etc., on their heads. They knew that he could foment profound revolution (religious and otherwise) wherever he had followers. They chose to have him crucified not only to put an end to his life, but to demonstrate he was a fraud who could not possibly have come from God; they chose to crucify (or have him crucified) to terrify those who might follow him into all the places discipleship might really lead them --- especially those places of human power and influence associated with religion and politics. The marks of the cross are a judgment (krisis) on this whole reality.
There are many gods and even very many manifestations of the real God available to us today (many partial, some more or less distorted), and so there were to Thomas and his brethren in those first days and weeks following the crucifixion of Jesus. When Thomas made his declaration about what he would and would not believe, none of these were crucified Gods or would be worthy of being believed in if they were associated with such shame and godlessness. Thomas knew how very easy it would be for his brother and sister disciples to latch onto one of these, or even to fall back on entirely traditional notions in reaction to the terribly devastating disappointment of Jesus' crucifixion. He knew, I think, how easy it might be to call the crucifixion and all it symbolized a terrible misunderstanding which God simply reversed or wiped away with the resurrection -- a distasteful chapter on which God has simply turned the page. Thomas knew that false prophets (and false "messiahs") showed up all the time. He knew that a God who is distant and all-powerful is much easier to believe in (and follow) than one who walks with us even in our sinfulness or who empties himself to become subject to the powers of sin and death, especially in the awful scandal and ignominy of the cross --- and who expects us to do essentially the same.
In other words, Thomas' doubt may have had less to do with the FACT of a resurrection, than it had to do with his concern that the disciples, in their desperation, guilt, and the immense social pressure they faced, had truly met and clung to the real Lord, the crucified One. In this way, and only in this way!) their own discipleship could and would come to be marked by the signs of the cross as they preach, suffer, and serve in the name (and so, in the paradoxical power) of THIS Lord and no other. Only he could inspire them; only he could sustain them; only he could accompany them wherever true discipleship led them.
Paul said, "I want to know Christ crucified and only Christ crucified" because only this Christ had transformed sinful, godless reality with his presence, only this Christ had redeemed even the realms of sin and death by remaining open to God even within these realities. Only this Christ would journey with us to the unexpected and unacceptable places, and in fact, only he would meet us there with the promise and presence of a God who would bring life out of them. Thomas, I believe, knew precisely what Paul would soon proclaim himself, and it is this, I think, which stands behind his insistence on seeing the wounds and putting his fingers in the very nail holes. He wanted to be sure his brethren were putting their faith in the crucified One, the one who turned everything upside down and relativized every other picture of God we might believe in. He became the great doubter because of this, but I suspect instead, he was the most astute theologian among the original Apostles. He, like Paul, wanted to know Christ Crucified and ONLY Christ Crucified.
We should not trivialize Thomas' witness by transforming him into a run of the mill empiricist and doubter (though doubting is an important piece of growth in faith)!! Instead, we should imitate his insistence: we are called upon to be followers of the Crucified God, and no other. Every version of God we meet should be closely examined for nail holes and the lance wound inflicted by the world of power and prestige. Everyone should be checked for signs that this God is capable of, as well as generous and merciful enough to assume such suffering on behalf of a creation he would reconcile and make whole. Only then do we know this IS the God proclaimed in the Gospels and the Epistles of Paul, the God of Easter, the only one worthy of being followed even into the darkest reaches of human sin and death, the only One who meets us in the unexpected and even unacceptable place; only this God is the One who makes all things new by loving us with an eternal love from which nothing at all can separate us.