Romans 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
According to Paul this is the way of salvation. It matters not that Paul wrote these words long after the event we are discussing, the way of salvation was acted upon by thousands of people before Paul wrote it down. My point is to show the disciples fulfilled all of these requirements in John 20 and did not have to wait for the promise to be endued with power to be born again.
John 20:1 The first day of the week cometh Mary Magdalene early, when it was yet dark, unto the sepulchre, and seeth the stone taken away from the sepulchre.
2 Then she runneth, and cometh to Simon Peter, and to the other disciple, whom Jesus loved, and saith unto them, They have taken away the Lord out of the sepulchre, and we know not where they have laid him.
3 Peter therefore went forth, and that other disciple, and came to the sepulchre.
4 So they ran both together: and the other disciple did outrun Peter, and came first to the sepulchre.
5 And he stooping down, and looking in, saw the linen clothes lying; yet went he not in.
6 Then cometh Simon Peter following him, and went into the sepulchre, and seeth the linen clothes lie,
7 And the napkin, that was about his head, not lying with the linen clothes, but wrapped together in a place by itself.
8 Then went in also that other disciple, which came first to the sepulchre, and he saw, and believed.
Note the “other disciple” “believed”. Words mean things are in scripture for a reason.
9 For as yet they knew not the scripture, that he must rise again from the dead.
10 Then the disciples went away again unto their own home.
11 But Mary stood without at the sepulchre weeping: and as she wept, she stooped down, and looked into the sepulchre,
12 And seeth two angels in white sitting, the one at the head, and the other at the feet, where the body of Jesus had lain.
13 And they say unto her, Woman, why weepest thou? She saith unto them, Because they have taken away my Lord, and I know not where they have laid him.
14 And when she had thus said, she turned herself back, and saw Jesus standing, and knew not that it was Jesus.
15 Jesus saith unto her, Woman, why weepest thou? whom seekest thou? She, supposing him to be the gardener, saith unto him, Sir, if thou have borne him hence, tell me where thou hast laid him, and I will take him away.
16 Jesus saith unto her, Mary. She turned herself, and saith unto him, Rabboni; which is to say, Master.
Do you think Mary believed God had raised Him from the dead at this point? I sure do.
17 Jesus saith unto her, Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God.
18 Mary Magdalene came and told the disciples that she had seen the Lord, and that he had spoken these things unto her.
19 Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you.
20 And when he had so said, he shewed unto them his hands and his side. Then were the disciples glad, when they saw the Lord.
Do you believe the rest of the disciples minus Thomas believe God had rased Him from the dead at this point? It sure looks that way to me.
21 Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.
22 And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost:
Your claim this is just an illustration and nothing actually happened at this point. I’ll just ask you to provide a corroborating example from scripture where Jesus spoke the words for something to happen and acted as He did by breathing on them and nothing actually happen. This passage does not say nothing happed at this point or does it say this was an object lesson for future reference. When Jesus spoke things happened, we will just have to agree to disagree on this point. In my opinion something very significant happened here.
23 Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained.
The verse is further evidence some happen here they were given authority .
24 But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.
25 The other disciples therefore said unto him, We have seen the Lord. But he said unto them, Except I shall see in his hands the print of the nails, and put my finger into the print of the nails, and thrust my hand into his side, I will not believe.
It is quite clear Thomas did not believe God had raised Jesus from the dead at this point. It is my contention he was not yet born again nor had he received the authority given to the others as yet.
26 And after eight days again his disciples were within, and Thomas with them: then came Jesus, the doors being shut, and stood in the midst, and said, Peace be unto you.
27 Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing.
Notice Jesus said he was faithless and admonished him to believe.
28 And Thomas answered and said unto him, My Lord and my God.
Do you think Thomas believed God had raised Jesus from the dead at this point? I sure do.
29 Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.
This verse in my opinion solidly shows Jesus tied the prior event to salvation.
30 And many other signs truly did Jesus in the presence of his disciples, which are not written in this book:
We are not given every small detail of what transpired but we are given enough to understand what happened.
31 But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
If after reading verse 31 you still have doubts the above passage describes the salvation experience of the disciples there’s nothing else I can say.