Not at all, I’m talking about the Plan of Salvation, the Epistles were written to the Churches that had already obeyed Acts 2:38. The Epistles were written to the Churches for
Instruction
Reproof
Correction
Guidance
The Book of Revelation is a Book of Prophecy
Matthew Mark Luke and John are the Gospel of Jesus Christ about His Birth, His Ministry, His Death, Burial, and Resurrection.
The Book of Acts is the History Book of the Church, its beginning, The Apostles Doctrine.
As long as we know how to keep the Word of God in context we will do alright.
But there are other things stated in the NT which suggest that your understanding of Acts 2:38 is not correct. Even the grammar of Acts 2:38 itself suggests an incorrect understanding. From A. T. Robertson's Word Pictures in the New Testament:
'
And be baptized every one of you (
kai baptisthētō hekastos hūmōn). Rather, “And let each one of you be baptized.” Change of number from plural to singular and of person from second to third. This change marks a break in the thought here that the English translation does not preserve. The first thing to do is make a radical and complete change of heart and life. Then let each one be baptized after this change has taken place, and the act of baptism be performed “in the name of Jesus Christ”.'
That is, baptism is separate from repentance for sin and comes
after a person is saved (justified).
Another issue is that Acts documents the things over a period of around three decades, including while some, like Paul, were on missionary journeys (
Acts timeline). The primary purpose of Acts is
not doctrine; that is largely what the epistles are for. And, we must not forget the doctrine that is in the gospels, namely:
Joh 1:12 But to all who did receive him,
who believed in his name, he gave the right to become children of God,
Joh 3:14 And as Moses lifted up the serpent in the wilderness,
so must the Son of Man be lifted up,
Joh 3:15
that whoever believes in him may have eternal life.
Joh 3:16 “For God so loved the world, that he gave his only Son,
that whoever believes in him should not perish but have eternal life.
...
Joh 3:18
Whoever believes in him is not condemned, but whoever does not believe is condemned already,
because he has not believed in the name of the only Son of God.
...
Joh 3:36
Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him.
Joh 5:24 Truly, truly, I say to you,
whoever hears my word and believes him who sent me has eternal life. He does not come into judgment,
but has passed from death to life.
Joh 6:47 Truly, truly, I say to you,
whoever believes has eternal life.
Joh 8:24 I told you that you would die in your sins, for
unless you believe that I am he you will die in your sins.”
Joh 11:25 Jesus said to her, “I am the resurrection and the life.
Whoever believes in me, though he die, yet shall he live,
Joh 11:26 and
everyone who lives and believes in me shall never die. Do you believe this?”
Joh 20:31 but these are written so that you may believe that Jesus is the Christ, the Son of God, and
that by believing you may have life in his name.
Why does neither Jesus nor John mention baptism for salvation, but only believing in Jesus, in his name?
And what else does Acts say?
Act 10:43 To him all the prophets bear witness
that everyone who believes in him receives forgiveness of sins through his name.”
When did baptism happen? After the fact:
Act 10:47 “Can anyone withhold water for baptizing these people, who have received the Holy Spirit just as we have?”
Act 10:48 And he commanded them to be baptized in the name of Jesus Christ. Then they asked him to remain for some days.
Act 11:17 If then God gave the same gift to them as he gave to us
when we believed in the Lord Jesus Christ, who was I that I could stand in God's way?”
Act 15:11
But we believe that we will be saved through the grace of the Lord Jesus, just as they will.”
Act 16:31 And they said, “
Believe in the Lord Jesus, and you will be saved, you and your household.”
(All ESV.)
Just in those two books alone, there is a
lot of believing "in the Lord Jesus" for salvation, and neither Jesus nor John mention baptism for salvation. The only mention of baptism in that context (Acts 2:38) likely means
after having already believed. And that is actually what we see throughout Acts--people believe and then are baptized.
Do you know that the Bible speaks of salvation using three different terms--justification, sanctification, and glorification--to represent a past event, an ongoing reality, and a future fulfillment?
I have repeatedly asked this question which you have yet to provide an actual answer. Why is that?