Hello
@Dan Perez,
The revelation concerning the Church which is the Body of Christ (the MYSTERY) was given to Paul, exclusively: who as the Lord's steward, administered it, by means of one to one dialogue, during prison visits, and by means of the epistles, Ephesians, Philippians, Colossians, 2 Timothy and Titus. (*
Roman's being foundational, especially 5:12-8:39)
* The Body of Christ came into being following Acts 28, and it's revelation to Paul.
See Acts 20, and the record of the meeting between Paul and the Ephesian Elders, in which Paul gives a resume of his ministry to them, in which no mention of the truth concerning the Mystery is mentioned, yet Paul says that he had withheld no truth from them (Acts 20:27 KJV). In order to say that, truthfully, he could not himself have received this further truth, at that time
* We know that Paul himself heard and believed this truth, and therefore identified himself with that company, and that Timothy also heard this truth from Paul, and kept that 'good deposit'; but we also know that all in Asia forsook Paul, and presumably also his message. So I do not know who entered into and became part of this company, Dan.
Hope this answers your question.
Within the love of Christ our Saviour,
our Lord and Head.
Chris