Today begin the O Antiphons--the last days leading up until Christmas. Fr. William Saunders has a good explanation of them here. They are different titles for the coming Christ invoked during these days before the Magnificat at evening prayer.
Today is O Sapientia--"Come, O Wisdom!"
O Sapientia: “O Wisdom, O holy Word of God, you govern all creation with your strong yet tender care. Come and show your people the way to salvation.” Isaiah had prophesied, “The spirit of the Lord shall rest upon him: a spirit of wisdom and of understanding, a spirit of counsel and of strength, a spirit of knowledge and fear of the Lord, and his delight shall be the fear of the Lord.” (11:2-3), and “Wonderful is His counsel and great is His wisdom.” (28:29).