Jesus went around to all the towns and villages, teaching in their synagogues, proclaiming the gospel of the kingdom, and curing every disease and illness.
At the sight of the crowds, his heart was moved with pity for them because they were troubled and abandoned, like sheep without a shepherd.
Then he said to his disciples, "The harvest is abundant but the laborers are few;
so ask the master of the harvest to send out laborers for his harvest."
Then he summoned his twelve disciples and gave them authority over unclean spirits to drive them out and to cure every disease and every illness.
Go rather to the lost sheep of the house of Israel.
As you go, make this proclamation: 'The kingdom of heaven is at hand.'"
Cure the sick, raise the dead, cleanse lepers, drive out demons. Without cost you have received; without cost you are to give."

Gospel commentary

Vatican Council II
Encyclical "Lumen fidei", § 20-21 (trans. © Libreria Editrice Vaticana)

The Church, to which we are all called in Christ Jesus, and in which we acquire sanctity through the grace of God, will attain its full perfection only in the glory of heaven, when there will come “the time of the restoration of all things” (Acts 3:21). At that time the human race as well as the entire world, which is intimately related to man and attains to its end through him, will be perfectly reestablished in Christ (…)

This promised restoration which we are awaiting has already begun in Christ, is carried forward in the mission of the Holy Spirit and through Him continues in the Church in which we learn the meaning of our terrestrial life through our faith, while we perform with hope in the future the work committed to us in this world by the Father, and thus work out our salvation (Phil 2:12).

Already the final age of the world has come upon us (1 Cor 10:11) and the renovation of the world is irrevocably decreed and is already anticipated in some kind of a real way; for the Church already on this earth is signed with a sanctity which is real although imperfect. However, until there shall be “new heavens and a new earth in which justice dwells”(2 Pt 3:13) the pilgrim Church in her sacraments and institutions, which pertain to this present time, has the appearance of this world which is passing and she herself dwells among creatures who “groan and travail in labor pains” until now and “await the revelation of the sons of God” (Rm 8:19f.).