What do we mean by “the Church is God’s kingdom on earth”?

In Book 2 of this Catechism, Chapter 6 on “The Exalted Nature of the Human Creation,” we saw that God the King of kings created man to make him a king who has freewill. He has authority primarily over his own heart and also over the fish, birds and all the animals and creatures on earth (Gen. 1:26), not so that he may be prideful and arrogant but so that he may be an ambassador of God who is the lover of mankind and servant of all.

Many people wonder, “What would have happened if Adam and Eve did not listen to the devil’s advice and deception?” Undoubtedly, if corruption did not enter the human race, earth would have been transformed into heaven where love, holiness and joy rules and not evil and oppression, and humans would have been like the angels of God.

Corruption has entered the human race, and as St. Augustine says that even an infant no longer accepts for his mother to breastfeed any other infant with him and would get very angry if he sees another baby trying to share his toys with him.

Despite this, among humans there were those who lifted up their eyes to God, singing, “ I have set the Lord always before me; Because He is at my right hand I shall not be moved.” The believer prays this verse in the Prime Hour that he may experience it by day and by night.

Since humanity lost its status as kings and queens both collectively and individually, the King of kings came to restore this royal life to them, both at the level of the individual and collectively. For this reason, St. John the evangelist does not say, “He made me a king” but “ He has made us kings and priests to His God and Father” (Rev. 1:6).

When we talk about the Church as Christ’s kingdom on earth, we refer to the Church which is one’s heart, mind, emotions and his entire being, and also one’s house and family, as well as the Church which worships the Lord and whose members enjoy being the children

of God through Baptism and Eucharist, while partaking with the heavenly hosts in their joy in the Lord and their unceasing praise and prayers for the salivation of the whole world and its open heart for everyone even those who persecute her.