The Lord always respects the freedom of those he calls. There are cases where people, in encountering Jesus, close their hearts to the change of life to which the Lord is calling them. Many people in Jesus's own time saw and heard him, and yet did not open their hearts to his word. Saint John's Gospel points to sin as the reason which prevents human beings from opening themselves to the light which is Christ: “the light has come into the world, and people loved darkness rather than light, because their deeds were evil” (Jn 3:19). The Gospels teach that attachment to wealth is an obstacle to accepting Christ's call to follow him fully and without reserve. Here, the attitude of the rich young man is indicative (cf. Mt 19:16-22; Mk 10:17-22; Lk 18:18-23).