Man's authority was never intended to be substituted for that of the Holy Spirit.
Exactly. Unfortunately, that is what the Reformation did.
It made man the authority rather than the Church founded by Jesus.
Now, any man can tack up a sign, claim guidance by the Holy Spirit, and proclaim the "truth".
In Jn. 16, Jesus promised the Spirit of truth to lead His people into 'all truth.' quote]
Jesus made this promise to his disciples, not to you.
What did they do?
Pope Clement writing to the Corinthians in about 95 AD:
Chapter 42. The Order of Ministers in the Church.
The
apostles have preached the gospel to us from the
Lord Jesus Christ; Jesus Christ from
God. Christ therefore was sent forth by
God, and the
apostles by Christ.
Both these appointments, then, were made in an orderly way, according to the will of God. Having therefore received their orders, and being fully assured by the resurrection of
our Lord Jesus Christ, and established in the word of
God, with full assurance of the
Holy Ghost, they went forth proclaiming that the kingdom of God was at hand.
And thus preaching through countries and cities, they appointed the first fruits [of their labours], having first proved them by the Spirit, to be bishops and deacons of those who should afterwards believe.
Chapter 44. The Ordinances of the Apostles, that There Might Be No Contention Respecting the Priestly Office.
Our
apostles also knew, through our Lord Jesus Christ, that there would be strife on account of the office of the
episcopate.
For this reason, therefore, inasmuch as they had obtained a perfect fore-
knowledge of this, they appointed those [ministers] already mentioned, and afterwards gave instructions,
that when these should fall asleep, other approved men should succeed them in their ministry.
Pope Clement I (called CLEMENS ROMANUS to distinguish him from the
Alexandrian), is the first of the successors of St. Peter of whom anything definite is known, and he is the first of the "Apostolic Fathers". His
feast is celebrated 23 November. He has left one genuine writing, a letter to the
Church of
Corinth, and many others have been attributed to him.