156 Those words of Pius XI merit serious consideration. When Scripture states that believers who fail to live in accordance with their faith “are crucifying again the Son of God” ( Heb 6:6), or when Paul, offering his sufferings for the sake of others, says that, “in my flesh I am completing what is lacking in Christ’s afflictions” ( Col 1:24), or again, when Christ in his passion prays not only for his disciples at that time, but also for “those who will believe in me through their word” ( Jn 17:20), all these statements challenge our usual way of thinking. They show us that it is not possible to sever the past completely from the present, however difficult our minds find this to grasp. The Gospel, in all its richness, was written not only for our prayerful meditation, but also to enable us to experience its reality in our works of love and in our interior life. This is certainly the case with regard to the mystery of Christ’s death and resurrection. The temporal distinctions that our minds employ appear incapable of embracing the fullness of this experience of faith, which is the basis both of our union with Christ in his suffering and of the strength, consolation and friendship that we enjoy with him in his risen life.
Source: Dilexit Nos (Vatican.va)