You all know by now that Thérèse is a doctor of the Church. As such the Church has declared that she has taught valuable doctrine concerning core church teachings. In particular, her "little way" is seen as a valuable contribution to the understanding of the Church.
However, the definition is that of a doctor of philosophy and the original meaning of Doctor. Thérèse is also a doctor in the modern sense. Through her deep understanding she corrects certain ailments in the church that come through exposure to the secular world.
from Spiritual Childhood: The Spirituality of St. Thérèse of Lisieux
Msgr. Vernon Johnson
The word "love" is so often used for something merely emotional or sentimental that we hesitate to use it in connection with our religion. St. Thérèse rescues us from this false reserve and puts the word "love" again upon our lips in its true meaning.
In the midst of us cold and grown-up lovers, with our love hardened by the difficulty of life, dulled by its dreary routine, stilted by convention, and fettered by human respect, God has placed St. Thérèse to rescue us from all that is false in our concept of love and lead us back to that simple, direct, spontaneous love which, in the depths of our souls, we really long for.
As we enter the crypt of the basilica at Lisieux, we find ourselves beneath the great arch which spans the entrance to the nave. At the base of one side of the arch are written these words of scripture: Thou shalt love the Lord thy God with thy whole heart and with thy whole soul and with thy whole mind. This is the greatest and the first commandment. And the second is like to this: Thou shalt love thy neighour as thyself. On the other side are the words of St. Thérèse: "There is but one thing to be done here below: to love Jesus and to save souls for Him that He may be more loved." Thus does she make the words of Scripture live again, words which we have known from childhood, but whose meaning for that very reason has lost much of its significance.
It may be urged that a love of such simple directness as St. Thérèse's is possible only for special souls, gifted with extraordinary supernatural graces, and that therefore it is not within the compass of the ordinary person. But St. Thérèse's life was not distinguished by anything spectacular. Her way, as she used to say, was very ordinary, fashioned through the normal means of grace common to us all. The extraordinary thing in her life was her simple fidelity to those means of grace.
Thérèse is a gift to us from God. Through her, as through St. Bernadette, He once again showed us that ordinary people can achieve extraordinary sanctity through perfectly ordinary means. In short, He showed us that once again “His Grace is sufficient.”
Of ourselves we can do nothing but sin. But with God we are, each of us, a saint and a source of hope for the people we meet every day. Thérèse has pulled us out of a sense of love that grasps and seeks to fill a great emptiness and shown us a love that comes from a fullness and reaches out to others. More, because she was not extraordinarily gifted—she did not have the mind of a St. Thomas Aquinas, or the high teaching of St. Francis de Sales, St. Alphonsus, or St. John of the Cross—she is accessible to us. Moreover, she promised to make herself accessible. Her heaven would be spent doing good on Earth. The good she does begins with our choice to follow the little way and to show to all around us the loved she showed while on Earth. We will each do this in our own way; however, our best tribute to her today would be one small action, one little sacrifice that takes us away from ourselves and puts us squarely with God and with our neighbor. Thus we can spend our Earth building the Kingdom of Heaven through God’s grace.
St. Thérèse, Doctor and Daughter of the Most Holy Catholic Church, pray for us that we all burn with the fire that you had for God and for the salvation of souls.