All the feasts of Our Lady are great events, because they are opportunities the church gives us to show with deeds that we love Mary. But if I had to choose one from among all her feasts, I would choose today's, the feast of the Divine Motherhood of the Blessed Virgin ...Don't forget, this is a Holy Day of Obligation.
When the Blessed Virgin said Yes, freely, to the plans revealed to her by the Creator, the divine Word assumed a human nature, with a rational soul and a body, formed in the most pure womb of Mary. The divine nature and the human were united in a single Person: Jesus Christ, true God and, thenceforth, true man: the only-begotten and Eternal Son of the Father and, from that moment on, as Man, the true son of Mary. This is why Our Lady is the Mother of the Incarnate Word, the Second Person of the Blessed Trinity, who has united our human nature to himself forever, without any confusion of the two natures. The greatest praise we can give to the Blessed Virgin is to address her loud and clear by the name that expresses her highest dignity: Mother of God.
St. Josemaria Escriva, Friends of God