10. The spiritual doctrine of Thérèse of Lisieux has helped extend the kingdom of God. By her example of holiness, of perfect fidelity to Mother Church, of full communion with the See of Peter, as well as by the special graces obtained by her for many missionary brothers and sisters, she has rendered a particular service to the renewed proclamation and experience of Christ's Gospel and to the extension of the Catholic faith in every nation on earth.

There is no need to dwell at length on the universality of Thérèse's doctrine and on the broad reception of her message during the century since her death: it has been well documented in the studies made in view of conferring on her the title of Doctor of the Church.

A particularly important fact in this regard is that the Church's Magisterium has not only recognized Thérèse's holiness, but has also highlighted the wisdom of her doctrine. Pius X had already said that she was "the greatest saint of modern times". On joyfully receiving the first Italian edition of the Story of a Soul, he extolled the fruits that had resulted from Thérèse's spirituality. Benedict XV, on the occasion of proclaiming the Servant of God's heroic virtues, explained the way of spiritual childhood and praised the knowledge of divine realities which God granted to Thérèse in order to teach others the ways of salvation (cf. AAS 13 [1921], pp. 449-452). On the occasion of both her beatification and canonization, Pius XI wished to expound and recommend the Saint's doctrine, underscoring her special divine enlightenment (Discorsi di Pio XI, vol. I, Turin 1959, p. 91) and describing her as a teacher of life (cf. AAS 17 [1925], pp. 211-214). When the Basilica of Lisieux was consecrated in 1954, Pius XII said, among other things, that Thérèse penetrated to the very heart of the Gospel with her doctrine (cf. AAS 46 [1954], pp. 404-408). Cardinal Angelo Roncalli, the future Pope John XXIII, visited Lisieux several times, especially when he was Nuncio in Paris. On various occasions during his pontificate he showed his devotion to the Saint and explained the relationship between the doctrine of the Saint of Avila and her daughter, Thérèse of Lisieux (Discorsi, Messaggi, Colloqui, vol. II [1959-1960], pp. 771-772). Many times during the celebration of the Second Vatican Council, the Fathers recalled her example and doctrine. On the centenary of her birth, Paul VI addressed a Letter on 2 January 1973 to the Bishop of Bayeux and Lisieux, in which he extolled Thérèse's example in the search for God, offered her as a teacher of prayer and theological virtue of hope, and a model of communion with the Church, calling the attention of teachers, educators, pastors and theologians themselves to the study of her doctrine (cf. AAS 65 [1973], pp. 12-15). I myself on various occasions have had the joy of recalling the person and doctrine of the Saint, especially during my unforgettable visit to Lisieux on 2 June 1980, when I wished to remind everyone: "One can say with conviction about Thérèse of Lisieux that the Spirit of God allowed her heart to reveal directly to the people of our time the fundamental mystery, the reality of the Gospel.... Her 'little way' is the way of 'holy childhood'. There is something unique in this way, the genius of St Thérèse of Lisieux. At the same time there is the confirmation and renewal of the most basic and most universal truth. What truth of the Gospel message is really more basic and more universal than this: God is our Father and we are his children?" (Insegnamenti di Giovanni Paolo II, vol. III/1 [1980], p. 1659).

These simple references to an uninterrupted series of testimonies from the Popes of this century on the holiness and doctrine of St Thérèse of the Child Jesus and to the universal dissemination of her message clearly express to what extent the Church, in her pastors and her faithful, has accepted the spiritual doctrine of this young Saint.

A sign of the ecclesial reception of the Saint's teaching is the appeal to her doctrine in many documents of the Church's ordinary Magisterium, especially when speaking of the contemplative and missionary vocation, of trust in the just and merciful God, of Christian joy and of the call to holiness. Evidence of this fact is the presence of her doctrine in the recent Catechism of the Catholic Church (nn. 127, 826, 956, 1011, 2011, 2558). She who so loved to learn the truths of the faith in the catechism deserved to be included among the authoritative witnesses of Catholic doctrine.

Thérèse possesses an exceptional universality. Her person, the Gospel message of the "little way" of trust and spiritual childhood have received and continue to receive a remarkable welcome, which has transcended every border.

The influence of her message extends first of all to men and women whose holiness and heroic virtues the Church herself has recognized, to the Church's pastors, to experts in theology and spirituality, to priests and seminarians, to men and women religious, to ecclesial movements and new communities, to men and women of every condition and every continent. To everyone Thérèse gives her personal confirmation that the Christian mystery, whose witness and apostle she became by making herself in prayer "the apostle of the apostles", as she boldly calls herself (Ms A, 56r·), must be taken literally, with the greatest possible realism, because it has a value for every time and place. The power of her message lies in its concrete explanation of how all Jesus' promises are fulfilled in the believer who knows how confidently to welcome in his own life the saving presence of the Redeemer.