To my comment that there are differences among Christians about issues that cannot be proven one way or another from scripture, you responded … Unfortunately, such an entity does not exist.
According to the Scriptures, such an indefectible entity does exist. In fact, it was prophesied by Isaiah.
A highway shall be there,
and it shall be called the Holy Way;
the unclean shall not travel on it,
but it shall be for God’s people;
no travelers, not even fools, shall go astray.
Isaiah 35, 8
But this I admit to you, that according to
the Way, which they call a sect, I worship the God of our ancestors, believing everything laid down according to the law or written in the prophets.
Acts 24, 14
I hope to come to you soon, but I am writing these intstructions to you so that, if I am delayed, you may know how one ought to behave in the household of God, which is
the Church of the living God, the pillar and bulwark of the truth. Without any doubt the mystery of our religion is great.
1 Timothy 3, 15-16
Although I am the least of all the saints, this grace was given to me to bring to the Gentiles the news of the boundless riches of Christ, and to make everyone see what is the plan of the mystery hidden for ages in God who created all things; so that
through the Church the wisdom of God in its rich variety might now be made known to the rulers and authorities in the heavenly places.
Ephesians 3, 8-10
An alternative to that is the acceptance and tolerance of different beliefs Paul wrote about in Romans 14
This text pertains to the question of religious practice and the exercise of discipline among the faithful - not universal doctrines belonging to the deposit of faith. Doctrinal unity was something St. Paul regarded as vitally essential for the integrity of the Church.
There is one body and one Spirit, just as you were called to the one hope of your calling; one Lord, one faith, one baptism.
Ephesians 4, 4-5
Only, live your life in a manner worthy of the gospel of Christ, so that, whether I come and see you or am absent and hear about you, I will know that you are
standing firm in one spirit, striving side by side in one mind for the faith of the gospel, and are in no way intimidated by your opponents.
Philippians 1, 27-28
Neeless to say, St. Paul warned the Romans about the false teachings of dissenters who were confusing the faithful and creating division among them with their unorthodox doctrines, and he exhorted them to hold on to what was traditionally handed down by the authentic apostolic teaching authority of the Church.
I urge you, brothers and sisters, to keep an eye on those who cause dissensions and offenses, in opposition to the teachings you have learned; avoid them. For such people do not serve our Lord Jesus Christ, but their own appetites, and by smooth talk and flattery they deceive the hearts of the simple-minded.
Romans 16, 17-18
St. Paul certainly acknowledged the need for a universal central teaching authority which could be traced back to the apostles through valid ordination for the preservation of doctrinal unity in the Church.
*Timothy, guard what has been entrusted to you. Avoid the vain chatter and contradictions of what is falsely called knowledge; by professing it some have missed the mark as regards the faith.
1 Timothy 6, 20-21
I left you in Crete for this reason, so that you should put in order what remained to be done, and should appoint elders in every town, as I directed you … For a bishop, as God’s steward, should be blameless … He must have a firm grasp of the word that is trustworthy in accordance with the teaching, so that he may be able both to preach with sound doctrine and to refute those who contradict it.
Titus 1, 5-9*
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