Dominus Iesus §19

19. To state the inseparable relationship between Christ and the kingdom is not to overlook the fact that the kingdom of God - even if considered in its historical phase - is not identified with the Church in her visible and social reality. In fact, “the action of Christ and the Spirit outside the Church's visible boundaries”‌ must not be excluded.⁷⁴ Therefore, one must also bear in mind that “the kingdom is the concern of everyone: individuals, society and the world. Working for the kingdom means acknowledging and promoting God's activity, which is present in human history and transforms it. Building the kingdom means working for liberation from evil in all its forms. In a word, the kingdom of God is the manifestation and the realization of God's plan of salvation in all its fullness”‌.⁷⁵

In considering the relationship between the kingdom of God, the kingdom of Christ, and the Church, it is necessary to avoid one-sided accentuations, as is the case with those “conceptions which deliberately emphasize the kingdom and which describe themselves as 'kingdom centred.' They stress the image of a Church which is not concerned about herself, but which is totally concerned with bearing witness to and serving the kingdom. It is a 'Church for others,' just as Christ is the 'man for others'... Together with positive aspects, these conceptions often reveal negative aspects as well. First, they are silent about Christ: the kingdom of which they speak is 'theocentrically' based, since, according to them, Christ cannot be understood by those who lack Christian faith, whereas different peoples, cultures, and religions are capable of finding common ground in the one divine reality, by whatever name it is called. For the same reason, they put great stress on the mystery of creation, which is reflected in the diversity of cultures and beliefs, but they keep silent about the mystery of redemption. Furthermore, the kingdom, as they understand it, ends up either leaving very little room for the Church or undervaluing the Church in reaction to a presumed 'ecclesiocentrism' of the past and because they consider the Church herself only a sign, for that matter a sign not without ambiguity”‌.⁷⁶ These theses are contrary to Catholic faith because they deny the unicity of the relationship which Christ and the Church have with the kingdom of God.

(74) John Paul II, Encyclical Letter Redemptoris missio, 18.

(75) Ibid., 15.

(76) Ibid., 17.