On November 21 each year we celebrate the feast of the The Entry of the Theotokos into the Temple. The event itself is not found in the Scriptures of the Church, but represents a theological understanding of what salvation in Christ means for the world and for each of us. St. Gregory Palamas writing in the 14th Century writes of the Virgin Theotokos in this way:
By heeding the evil counsel of the pernicious angel, man transgressed the divine commandments, was shown to be unworthy, forfeited the pledge, and interrupted God’s plan. God’s grace, however, is unalterable and His purpose cannot prove false, so some of man’s offspring were chosen, that, from among many, a suitable receptacle for this divine adoption and grace might be found, who would serve God’s will perfectly, and would be revealed as a vessel worthy to unite divine and human nature in one person, not just exalting our nature, but restoring the human race.
The holy Maid and Virgin Mother of God was this vessel, so she was proclaimed by the Archangel Gabriel as full of grace (Lk. 1:28), being the chosen one among the chosen, blameless, undefiled and worthy to contain the person of the God-Man and to collaborate with Him. Therefore God pre-ordained her before all ages, chose her from among all that had ever lived, and deemed her worthy of more grace than anyone else, making her the holiest of saints, even before her mysterious childbearing. For that reason, He graciously willed that she should make her home in the Holy of Holies, and accepted her as His companion to share His dwelling from her childhood.
He did not simply choose her from the masses, but from the elect of all time, who were admired and renowned for their piety and wisdom, and for their character, words and deeds, which pleased God and brought benefit to all.
(The Homilies, p. 469)
Two hymns for the Feast of the Entry of the Theotokos into the Temple:
Today is the preview of the good will of God, of the preaching of the salvation of mankind. The Virgin appears in the temple of God, in anticipation proclaiming Christ to all. Let us rejoice and sing to her: Rejoice, O Divine Fulfillment of the Creator’s dispensation (Troparion).
The most pure Temple of the Savior, the precious Chamber and Virgin, the Sacred Treasure of the Glory of God, is presented today to the house of the Lord. She brings with her the grace of the Spirit, which the angels of God do praise. Truly this woman is the Abode of Heaven! (Kontakion).