Ephesians 4:30 explains how that seal of adoption is permanent as unto that day of redemption. That seal is not going anywhere just as that foundation laid by Jesus Christ is not going anywhere. So that is why we are to be held accountable for what we sow towards for our bodies are the temples of the Holy Spirit.
1 Corinthians 6:19 What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? 20 For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's.
Again, those passages are talking about the
indwelling of the Holy Spirit, not the
infilling. Being filled with the Holy Spirit is a different experience. Here are a couple of good articles on the difference between the two:
Filling versus Indwelling by the Holy Spirit - Armour's Answers
What is the Difference Between the Indwelling of the Spirit and Being Filled by the Spirit? - Think Life Change
If they were already saved when they had prayed that prayer, then why sell all that they have, laying it at the apostles feet before distributing evenly to every member as if being that new community of 5,000 believers? So no. When Peter & John got arrested, they potential 5,000 believers were not saved yet.
That's absurd. Read Acts 2:40-47:
40 And with many other words he bore witness and continued to exhort them, saying, “Save yourselves from this crooked generation.” 41 So those who received his word were baptized, and there were added that day about three thousand souls.
The Fellowship of the Believers
42 And they devoted themselves to the apostles' teaching and the fellowship, to the breaking of bread and the prayers. 43 And awe came upon every soul, and many wonders and signs were being done through the apostles. 44 And all who believed were together and had all things in common. 45 And they were selling their possessions and belongings and distributing the proceeds to all, as any had need. 46 And day by day, attending the temple together and breaking bread in their homes, they received their food with glad and generous hearts, 47 praising God and having favor with all the people. And the Lord added to their number day by day those who were being saved.
Acts 2:47 cannot be more explicit:
"... those who were being saved".
Tons of believers were already being saved. Thousands. And that's two chapters before Acts 4.
So no, they were already saved.
Moreover, Acts 4:31 says:
And when they had prayed, the place in which they were gathered together was shaken, and they were all filled with the Holy Spirit and continued to speak the word of God with boldness.
Note the word "all". They were
ALL filled, including Peter, John and many other believers that were ALREADY SAVED as Acts 2:47 EXPLICITLY states.
That's absurd. Are you really saying that the apostles were lost prior to Acts 2?
They lived with Jesus for 3.5 years, they saw Him in resurrected form for 40 days, Jesus was their Master, Lord and Savior, they were all together in the upper room for about 10 days in prayer and probably fasting, waiting for the promise, and are you really going to say that no one of the apostles was saved? Sorry, but that just makes no sense whatsoever.
Again the promise of the forever indwellling holy Ghost will only come at our salvation when Jesus was no longer present with them. John 14:1-3 John 14:16-17 & John 14:25-26
And again you seem to be confusing the indwelling of the Holy Spirit with the infilling of the Holy Spirit. Please refer to the links at the top of this post.
out of bracket so you can see this truth that they never had the Holy Spirit yet.
12 But when they believed Philip as he preached good news about the kingdom of God and the name of Jesus Christ, they were baptized, both men and women. 13 Even Simon himself believed, and after being baptized he continued with Philip. And seeing signs and great miracles performed, he was amazed. 14 Now when the apostles at Jerusalem heard that Samaria had received the word of God, they sent to them Peter and John, 15 who came down and prayed for them that they might receive the Holy Spirit, 16 for he had not yet fallen on any of them, but they had only been baptized in the name of the Lord Jesus.
Verse 15 is saying that they hadn't received the Holy Spirit yet in a
supernatural, manifest manner. That's why it says "for he had not yet
fallen on any of them", it is talking about the Holy Spirit falling upon them in supernatural fashion, as the baptism of the Holy Spirit in Acts 2, with supernatural manifestations. That's why Simon was astonished by this power and said:
17 Then they laid their hands on them and they received the Holy Spirit. 18 Now when Simon saw that the Spirit was given through the laying on of the apostles' hands, he offered them money, 19 saying, “Give me this power also, so that anyone on whom I lay my hands may receive the Holy Spirit.”
Acts 8 is talking about the supernatural baptism of the Holy Spirit with clear manifestations (to the point that Simon was tempted to offer money to the Apostles in exchange for this power), not the indwelling of the Holy Spirit.
But Jesus is with us always per Matthew 28:20 & so is that seal of adoption Ephesians 4:30
Again, refer to the links at the top on the difference between the indwelling and the infilling of the Holy Spirit.
That means after the promise has bene given, no believer should ask for the holy Spirit again unless they make the Father look evil as if He did not give the Holy Spirit the first time for coming to & believing in Jesus Christ. So I do not see any continual filling of the Spirit but an assurance that we will never hunger nor thirst to be filled again after coming to & believing in Jesus Christ.
Which is completely refuted by Acts 4:31. They were already saved, and yet they prayed to God, and they received a fresh infilling of the Holy Spirit to continue to preach the gospel with boldness, with signs and wonders.
29 And now, Lord, look upon their threats and grant to your servants to continue to speak your word with all boldness, 30 while you stretch out your hand to heal, and signs and wonders are performed through the name of your holy servant Jesus.” 31 And when they had prayed, the place in which they were gathered together was shaken, and they were all filled with the Holy Spirit and continued to speak the word of God with boldness.