The feast of All Saints is not only a commemoration of saints long dead but of all the saints throughout time, from the origins of humanity to the consummation of the age and the Second Coming of Christ.
In the second coming of Christ, all of us are going to receive a resurrected body. We will live in eternity in both body and soul, being forever filled with the presence of the resurrected and ascended Christ.
Initially, when Thomas first heard about the resurrection from the other disciples, he was greatly disappointed to have missed the event. So great was his disappointment, and so great was his desire to experience the reality of the resurrection, that he challenged his God to make it real.