Redemptoris Missio §15

¹⁵ The kingdom aims at transforming human relationships; it grows gradually as people slowly learn to love, forgive and serve one another. Jesus sums up the whole Law, focusing it on the commandment of love (cf. Mt 22:34-40; Lk 10:25-28). Before leaving his disciples, he gives them a "new commandment": "Love one another; even as I have loved you" (Jn 13:34; cf. 15:12). Jesus' love for the world finds its highest expression in the gift of his life for mankind (cf. Jn 15:13), which manifests the love which the Father has for the world (cf. Jn 3:16). The kingdom's nature, therefore, is one of communion among all human beings-with one another and with God. 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.