Preface 5 - Incarnation

From the Book of Divine Worship - The Proper: First Part - The Holy Eucharist - Rite Two - Prefaces for Seasons.

It is right, and a good and joyful thing, always and everywhere to give thanks to you, Father Almighty, Creator of heaven and earth; because you gave Jesus Christ, your only Son, to be born for us; who, by the mighty power of the Holy Spirit, was made perfect Man of the flesh of the Virgin Mary his mother; so that we might be delivered from the bondage of sin, and receive power to become your children.