Book of Zechariah 8:1-8.
This word of the LORD of hosts came: Thus says the LORD of hosts: I am intensely jealous for Zion, stirred to jealous wrath for her. Thus says the LORD: I will return to Zion, and I will dwell within Jerusalem; Jerusalem shall be called the faithful city, and the mountain of the LORD of hosts, the holy mountain. Thus says the LORD of hosts: Old men and old women, each with staff in hand because of old age, shall again sit in the streets of Jerusalem. The city shall be filled with boys and girls playing in her streets. Thus says the LORD of hosts: Even if this should seem impossible in the eyes of the remnant of this people, shall it in those days be impossible in my eyes also, says the LORD of hosts? Thus says the LORD of hosts: Lo, I will rescue my people from the land of the rising sun, and from the land of the setting sun. I will bring them back to dwell within Jerusalem. They shall be my people, and I will be their God, with faithfulness and justice.
The nations shall revere your name, LORD, all the kings of the earth, your glory, Once the LORD has rebuilt Zion and appeared in glory, Heeding the plea of the lowly, not scorning their prayer. Let this be written for the next generation, for a people not yet born, that they may praise the LORD: "The LORD looked down from the holy heights, viewed the earth from heaven, To attend to the groaning of the prisoners, to release those doomed to die." May the children of your servants live on; may their descendants live in your presence. Then the LORD'S name will be declared on Zion, the praise of God in Jerusalem, When all peoples and kingdoms gather to worship the LORD.
Holy Gospel of Jesus Christ according to Saint Luke 9:46-50.
An argument arose among the disciples about which of them was the greatest. Jesus realized the intention of their hearts and took a child and placed it by his side and said to them, "Whoever receives this child in my name receives me, and whoever receives me receives the one who sent me. For the one who is least among all of you is the one who is the greatest." Then John said in reply, "Master, we saw someone casting out demons in your name and we tried to prevent him because he does not follow in our company." Jesus said to him, "Do not prevent him, for whoever is not against you is for you."
Commentary of the day Vatican Council II Constitution on the Church in the modern world « Gaudium et spes », § 92 (©Libreria Vaticana editrice) "Whoever is not against you is for you"
By virtue of her mission to shed on the whole world the radiance of the Gospel message, and to unify under one Spirit all men of whatever nation, race or culture, the Church stands forth as a sign of that brotherhood which allows honest dialogue and gives it vigor. Such a mission requires in the first place that we foster within the Church herself mutual esteem, reverence and harmony, through the full recognition of lawful diversity. Thus all those who compose the one People of God, both pastors and the general faithful, can engage in dialogue with ever abounding fruitfulness. For the bonds which unite the faithful are mightier than anything dividing them. Hence, let there be unity in what is necessary; freedom in what is unsettled, and charity in any case. Our hearts embrace also those brothers and communities not yet living with us in full communion; to them we are linked nonetheless by our profession of the Father and the Son and the Holy Spirit, and by the bond of charity... We think cordially too of all who acknowledge God, and who preserve in their traditions precious elements of religion and humanity. We want frank conversation to compel us all to receive the impulses of the Spirit faithfully and to act on them energetically. For our part, the desire for such dialogue, which can lead to truth through love alone, excludes no one, though an appropriate measure of prudence must undoubtedly be exercised. We include those who cultivate outstanding qualities of the human spirit, but do not yet acknowledge the Source of these qualities. We include those who oppress the Church and harass her in manifold ways. Since God the Father is the origin and purpose of all men, we are all called to be brothers. Therefore, if we have been summoned to the same destiny, human and divine, we can and we should work together without violence and deceit in order to build up the world in genuine peace.