206 Saint John Paul II spoke of the social dimension of devotion to the heart of Christ, but also about “reparation, which is apostolic cooperation in the salvation of the world”. Consecration to the heart of Christ is thus “to be seen in relation to the Church’s missionary activity, since it responds to the desire of Jesus’ heart to spread throughout the world, through the members of his Body, his complete commitment to the Kingdom”. As a result, “through the witness of Christians, love will be poured into human hearts, to build up the body of Christ which is the Church, and to build a society of justice, peace and fraternity”.
Source: Dilexit Nos (Vatican.va)