Confidence in the Messias Who is to come.
The liturgy for Advent constantly speaks to us of mercy, redemption, salvation, deliverance, light, abundance, joy, peace. "Behold the Saviour cometh; on the day of His Birth, the world shall be flooded with light"; "exult then with joy, O Jerusalem, for the Saviour shall appear"; "peace shall fill our earth when He shews Himself."
Christ brings with Him all the blessings that can be lavished upon a soul: Cum illo omnia nobis donavit.
Let then our hearts yield themselves up to an absolute confidence in Him Who is to come. It is to render ourselves very pleasing to the Father to believe that His Son Jesus can do everything for the sanctification of our souls. Thereby we declare that Jesus is equal to Him, and that the Father "hath given all things into His hand."
Such confidence cannot be mistaken. In the Mass for the first Sunday in Advent, the Church three times gives us the firm assurance of this. "None of them that wait on Thee shall be confounded": Qui te exspectant non confundentur.
Christ in His Mysteries, p. 110
D. Columba Marmion