Today’s fourth of the O Antiphons speaks of the Lord as the key: “O Key of David, opening the gates of God’s eternal Kingdom: come and free the prisoners of darkness!”
This language comes from Isaiah 22:22, alluding to the authority of the one chosen by God, according to the house of David. Keys signify authority – only those who have a right to what a key unlocks are permitted to carry them. The one with the keys can bar others from entering, or swing wide the doors to allow them in.
In Christian tradition, too, keys hold a rich symbolism. The Lord Himself used the language of keys when, in response to Peter’s confession of faith, He entrusts ‘the keys to the kingdom of heaven’ to Peter and the Apostles: whatever they bind on earth will be bound in heaven, and whatever they loose on earth will be loosed in heaven. Thus was established the sacrament of confession, in which we receive and celebrate the mercy of God.
Though the Lord has authority to enter through any doors, He respects the authority we have over our own hearts; He will not enter uninvited. Similarly, He will not force us to pass through the entrance of heaven which He has swung open on our behalf. Instead, He gently knocks at the doors of our hearts, ready to invite & welcome us into His. May we take the opportunity to respond, allowing the Lord in – especially through the celebration of the sacrament of confession – so that with Him, we might be made worthy to enter the gates of God’s eternal Kingdom.