I didn't bring up the CCC. Why did you? When have I ever referenced the CCC on this site as proof of a doctrine? Since you do not accept the authority of the CCC, why would you think I would be stupid enough to cite it as an authority?
Peter didn't. Christ claimed that when he gave Peter the keys. In the Pentecostal Church, Peter certainly played a central role in leading the apostolic community.
He didn't claim to be infallible. What he taught was what was infallible because God guided his teaching.
Ultimately, everything the apostles taught, as far as I am aware, they got from God--whether it be from the Old Testament Scriptures, the Jewish Tradition in which they were apart and or what Jesus taught them.
When they dispensed with the Old Testament requirement of circumcision. That would be one example. The Bible nowhere abrogated that practice. The apostles, however, felt quite free to dispense with the requirement. They seemed to believe they had the authority to do that.
The concept of Mortal or deadly sin, that is, sin unto death was introduced in the writings of John. "All wrongdoing is sin, and there is sin that does not lead to death." First John 5:17.
Follow the bouncing ball:
All wrongdoing is sin
There is sin that does not lead to death
If there is sin that does not lead to death, it follows from the statement that there are sins that lead to death.
If some sins do not lead to death, then there are Venial Sins. Venial Sins, very simply, is a term that refers to sins that do not lead to death. If there are some sins, or one sin that does lead to death, it follow that some sins are Mortal. Mortal Sin is just a term used to describe sins that are deadly; that is, some sins, or sin that lead to death.
In the commandment to keep holy the Sabbath. Sabbath worship is part of what it means to honor that commandment.
When he breathed on the apostles gave them the Holy Spirit and empowered them to forgive sins. How can one follow the command to forgive sins--if people do not tell them their sins?
To say "Well, you know, like, you know, like he was referring to preaching the Gospel, man." Is no answer. That is not what is said when he gives the apostles the Holy Spirit. He does not say "Receive the Holy Spirit so you can preach the Gospel and through preaching the Gospel forgive men's sins."