Authoritative Church

Mt 28:18 And Jesus coming, spoke to them, saying: All power is given to me in heaven and in earth.
Mt 28:19 Going therefore, teach ye all nations; baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
Mt 28:20 Teaching them to observe all things whatsoever I have commanded you: and behold I am with you all days, even to the consummation of the world.
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Jn 20:23 Whose sins you shall forgive, they are forgiven them; and whose sins you shall retain, they are retained.
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1 Cor 11:23 For I have received of the Lord that which also I delivered unto you, that the Lord Jesus, the same night in which he was betrayed, took bread.
1Cor 11:24 And giving thanks, broke, and said: Take ye, and eat: this is my body, which shall be delivered for you: this do for the commemoration of me.
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Lu 10:16 He that hears you, hears me; and he that despises you, despises me; and he that despises me, despises him that sent me.
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Mt 18:17 And if he will not hear them: tell the church. And if he will not hear the church, let him be to thee as the heathen and publican.
Mt 18:18 Amen I say to you, whatsoever you shall bind upon earth, shall be bound also in heaven; and whatsoever you shall loose upon earth, shall be loosed also in heaven.
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St. Irenaeus (c200 AD) “… the Church, having received this preaching and this faith, although she is disseminated throughout the whole world, yet guarded it, as if she occupied but one house. She likewise believes these things just as if she had but one soul and one and the same heart; and harmoniously she proclaims them and teaches them and hands them down, as if she possessed but one mouth..” Against Heresies 1,10,2
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Eusibius of Caesarea (4th c): “But the brightness of the Catholic Church proceeded to increase in greatness, for it ever held to the same points in the same way, and radiated forth to all the race of Greeks and barbarians the reverent, sincere, and free nature, and the sobriety and purity of the divine teaching as to conduct and thought.” Ecclesiastical History 4, 7, 13
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St. Augustine (392 AD): “The Catholic Church is the work of Divine Providence, achieved through the prophecies of the prophets, through the Incarnation and the teaching of Christ, through the journeys of the Apostles, through the suffering, the crosses, the blood, and the death of the martyrs, through the admirable lives of the saints….When, then, we see so much help on God’s part, so much progress and so much fruit, shall we hesitate to bury ourselves in the bosom of that Church? For starting from the apostolic chair down through successions of bishops, the crown of teaching authority.” The Advantage of Believing 35