SOLEMNITY OF THE IMMACULATE CONCEPTION OF THE BLESSED VIRGIN MARY
"...The Holy Spirit will come upon you, and the power of the Most High will overshadow you. Therefore the child to be born will be called holy, the Son of God. And behold, Elizabeth, your relative, has also conceived a son in her old age, and this is the sixth month for her who was called barren; for nothing will be impossible for God." Mary said, "Behold, I am the handmaid of the Lord. May it be done to me according to your word." Then the angel departed from her."
Collect Prayer: O God, who by the Immaculate Conception of the Blessed Virgin prepared a worthy dwelling for your Son, grant, we pray, that, as you preserved her from every stain by virtue of the Death of your Son, which you foresaw, so, through her intercession, we, too, may be cleansed and admitted to your presence. Through our Lord Jesus Christ, your Son, who lives and reigns with you in the unity of the Holy Spirit, one God, for ever and ever.
Solemnities are the celebrations of greatest importance; a feast day of the highest rank, celebrating a mystery of faith.
God preserved Our Blessed Mother (the Mother of Jesus) from Every Sin, THROUGH the death of His Son (Jesus). Meditate on that!