The holy company having arrived at the temple in Jerusalem, the holy child turns to her parents, and kneeling, kisses their hands, asks their blessing, and then, without looking back, ascends the steps of the temple. There renouncing entirely the world and all things that the world could give her, she offers and consecrates herself wholly to God. Henceforth the life of Mary in the temple was but one continual exercise of love, and the offering of her whole self to her Lord. She increased from hour to hour, nay, from moment to moment, in holy virtues, sustained indeed by divine grace, but always endeavoring, with all her powers, to correspond with grace. Mary herself revealed this to St. Elizabeth, the virgin, saying: "Do you think that I obtained the graces and virtues without an effort? Know that I received from God no grace without great effort, continual prayer, an ardent desire, and many tears and penances."
Thus Mary, a young virgin in the temple, did nothing but pray. And seeing the human race lost and hateful to God, she especially prayed for the coming of the Messias, desiring then to be the servant of that happy Virgin who was to be the mother of God. Oh, who would have said to her then: Oh holy Lady, know that already through thy prayers the Son of God is hastening to come and redeem the world; and know that thou art the blessed one chosen to be the mother of thy Creator. Oh beloved of God, most holy child, thou prayest for all, pray also for me. Thou hast consecrated thyself wholly even from infancy, to the love of thy God; ah, obtain for me at least that during the remaining years of my life I may live for God alone. Today together with thee, I renounce all creatures, and consecrate myself to the love of my Lord. I also offer myself to thee, oh my queen, to serve thee forever. Accept me for thy special servant and obtain for me the grace to be faithful to thee and to thy Son, that I may come one day to praise thee and love thee eternally in paradise.
The Glories of Mary, St. Alphonsus Liguori, 1888