Lumen Gentium §65

⁶⁵ But while in the most holy Virgin the Church has already reached that perfection whereby she is without spot or wrinkle, the followers of Christ still strive to increase in holiness by conquering sin. And so they turn their eyes to Mary who shines forth to the whole community of the elect as the model of virtues. Piously meditating on her and contemplating her in the light of the Word made man, the Church with reverence enters more intimately into the great mystery of the Incarnation and becomes more and more like her Spouse. For Mary, who since her entry into salvation history unites in herself and re-echoes the greatest teachings of the faith as she is proclaimed and venerated, calls the faithful to her Son and His sacrifice and to the love of the Father. Seeking after the glory of Christ, the Church becomes more like her exalted Type, and continually progresses in faith, hope and charity, seeking and doing the will of God in all things. Hence the Church, in her apostolic work also, justly looks to her, who, conceived of the Holy Spirit, brought forth Christ, who was born of the Virgin that through the Church He may be born and may increase in the hearts of the faithful also. The Virgin in her own life lived an example of that maternal love, by which it behooves that all should be animated who cooperate in the apostolic mission of the Church for the regeneration of men. IV. The Cult of the Blessed Virgin in the Church