Although the Kingdom of God has begun to come in Christ, and continues among us through His Real Presence in the Eucharist, and in the Church, it has not yet reached its final consummation.
We therefore pray for its perfect fulfillment, when Christ returns in glory, and hands over the Kingdom to God the Father.
By looking forward to the Lord’s coming, our minds turn to the last things – death, judgment, heaven, and hell. We recognize our own need to prepare, so that we may be ready to welcome the Lord whenever He comes for us.
The liturgical season of Advent is focused upon the theme of preparation for His coming. We most often associate Advent with salvation history, setting the stage for our celebration of Christmas, the mystery of God’s becoming a newborn baby.
But Christ’s coming is not just a single historical event. We experience many comings of the Lord: He regularly enters our hearts through His grace, pre-eminently when we receive His Body and Blood in the Eucharist. Let us reflect upon the ways that Christ comes to us, in history, in our lives, and in His ultimate return at the end of time.
For more, see Catechism paragraphs 2816-21.