Please notice carefully that Jesus told Peter "when" he was converted. This proves that Peter was not yet "converted" (after Peter *was* converted and received the POWER, he NEVER denied Jesus.)
Luke 22:31 And the Lord said, Simon, Simon, behold, Satan hath desired [to have] you,
that he may sift [you] as wheat:
Luke 22:32 But I have prayed for thee, that thy faith fail not: and when thou art
converted, strengthen thy brethren.
Luke 22:33 And he said unto him, Lord, I am ready to go with thee, both into prison, and
to death.
Luke 22:34 And he said, I tell thee, Peter, the cock shall not crow this day, before that
thou shalt thrice deny that thou knowest me.
When Jesus spoke of the "church" He spoke of it in "future tense" (the church was not started until the book of Acts).
Matthew 16:18 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
Jesus gave Peter the keys to unlock the door to the new testament church.
Matthew 16:19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.
Peter unlocked the door to the church on the day of Pentecost in approximately 33 AD.
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Acts 2:39 For the promise is unto you, and to your children, and to all that are afar off, [even] as many as the Lord our God shall call.
The man with the keys declared that Acts 2:38 was for as many as God would call.
Acts 2:40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
Acts 2:41 Then they that gladly received his word were baptized: and the same day there were added [unto them] about three thousand souls.
Three thousand had their sins remitted by being baptised in Jesus name. Acts 2:42 And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers.
They did not depart from that "Apostles' doctrine". But Paul later gave instructions concerning "men pleasing" deceivers that might come along:
Galatians 1:8 But though we, or an angel from heaven, preach any other gospel unto you
than that which we have preached unto you, let him be accursed.
Galatians 1:9 As we said before, so say I now again, If any [man] preach any other gospel
unto you than that ye have received, let him be accursed.
Galatians 1:10 For do I now persuade men, or God? or do I seek to please men? for if I yet
pleased men, I should not be the servant of Christ.
Rev. Steve Winter