Redemptoris Missio §18

¹⁸ This is not the kingdom of God as we know it from Revelation. The kingdom cannot be detached either from Christ or from the Church. As has already been said, Christ not only proclaimed the kingdom, but in him the kingdom itself became present and was fulfilled. This happened not only through his words and his deeds: "Above all,...the kingdom is made manifest in the very person of Christ, Son of God and Son of Man, who came 'to serve and to give his life as a ransom for many' (Mk 10:45)." The kingdom of God is not a concept, a doctrine, or a program subject to free interpretation, but it is before all else a person with the face and name of Jesus of Nazareth, the image of the invisible God. If the kingdom is separated from Jesus, it is no longer the kingdom of God which he revealed. The result is a distortion of the meaning of the kingdom, which runs the risk of being transformed into a purely human or ideological goal, and a distortion of the identity of Christ, who no longer appears as the Lord to whom everything must one day be subjected (cf. 1 Cor 15:27). Likewise, one may not separate the kingdom from the Church. It is true that the Church is not an end unto herself, since she is ordered toward the kingdom of God of which she is the seed, sign and instrument. Yet, while remaining distinct from Christ and the kingdom, the Church is indissolubly united to both. Christ endowed the Church, his body, with the fullness of the benefits and means of salvation. The Holy Spirit dwells in her, enlivens her with his gifts and charisms, sanctifies, guides and constantly renews her. The result is a unique and special relationship which, while not excluding the action of Christ and the Spirit outside the Church's visible boundaries, confers upon her a specific and necessary role; hence the Church's special connection with the kingdom of God and of Christ, which she has "the mission of announcing and inaugurating among all peoples."