A look at the bible Students and different Jehovah's Witnesses regulations or prescriptions and rules for undergoing baptism.
Peter evidently did not view himself as the rock on which Jesus would build his congregation, since he wrote at 1Pe 2:4-8 that Jesus was the long-foretold “foundation cornerstone,” chosen by God himself. Similarly, the apostle Paul referred to Jesus as the “foundation” and “the spiritual rock.” (1Co 3:11; 10:4). For every Christian or follower of Christ their church or community should have Jesus as their cornerstone and not as such one or another hierarchical religious organisation.
For matters that happened in the first century of our common era historians of the first century like Tacitus, Josephus and later ancient writers like Africanus provided enough material to go and further Alexandrian manuscripts, findings from the Qumram caves and research from contemporary archaeologists and historians like Blomberg, Henry, Scott, Tabor, Droge, Ramsay, Samuelsson and many others.
Since the 19th century the people who very suspicious because they did not see historical evidence could find one city after another, one civilization after another, one culture after another being found and restored to their proper places in ancient history by the studies of archaeologists and Bible scholars like Botta, Layard, Wellhausen, Winckler, Taylor, Archer a.o..
We can look at the biblical authors as Witnesses for Jehovah God, the divine Creator of many universes, as people who were called to testify before humankind and in several occasions were even willing to give up their life for what they considered to be the truth.