Christian revelation excludes reincarnation, and speaks of a fulfilment which man is called to achieve in the course of a single earthly existence. Man achieves this fulfilment of his destiny through the sincere gift of self, a gift which is made possible only through his encounter with God. It is in God that man finds full self-realization: this is the truth revealed by Christ. Man fulfils himself in God, who comes to meet him through his Eternal Son. Thanks to God's coming on earth, human time, which began at Creation, has reached its fullness. "The fullness of time" is in fact eternity, indeed, it is the One who is eternal, God himself. Thus, to enter into "the fullness of time" means to reach the end of time and to transcend its limits, in order to find time's fulfilment in the eternity of God.
[Pope John Paul II, Tertio Millennio Adveniente n.9]
5. We shall conclude this catechesis by turning once again to the figure of Jesus Christ, High Priest, Good Shepherd and supreme exemplar of priests. He is the model of the spoliation of earthly goods for the priest who wants to conform to the requirement of evangelical poverty. For Jesus was born and lived in poverty. St Paul admonished: 'From being rich that he was, he became poor for your sake' (2 Cor 8:9). Jesus himself, to one who wanted to follow him, said of himself: "Foxes have their dens and birds of the air their nests, but the Son of Man has nowhere to lay his head" (Lk 9:57). These words manifest a complete detachment from all earthly comforts. It should not be concluded, however, that Jesus lived in misery. Other passages in the Gospels report that he received and accepted invitations to the homes of rich people (cf. Mt 9:10-11; Mk 2:15-16; Lk 5:29; 7:36; 19:5-6), had female co-workers to support him in his financial needs (Lk 8:2-3; cf. Mt 27:55; Mk 15:40; Lk 23:55-56) and was able to give alms to the poor (cf. Jn 13:29). There is no doubt, however, about the life and spirit of poverty that characterised Him.
[Pope John Paul II, General Audience 21 July 1993]