This paragraph through number 31 address “Activity That Sanctifies.” What does Pope Francis mean by this?
25. Just as you cannot understand Christ apart from the kingdom he came to bring, so too your personal mission is inseparable from the building of that kingdom: “Strive first for the kingdom of God and his righteousness” (Mt 6:33). Your identification with Christ and his will involves a commitment to build with him that kingdom of love, justice and universal peace. Christ himself wants to experience this with you, in all the efforts and sacrifices that it entails, but also in all the joy and enrichment it brings. You cannot grow in holiness without committing yourself, body and soul, to giving your best to this endeavor.
Cooperation with the mission of Christ: the suggestion of this is all through the Gospels. Mind, heart, soul, and strength. Go and make disciples. Christ the vine and we the branches. The connection is not a job or even a vocation in the way we usually understand it. It is a baptismal way of life.