The purpose of those signs was to bring about the completed NT and confirmation of it (Heb 2:3-4) which occurred by the end of the first century, Therefore the signs fulfilled their purpose and ceased as Paul said they would. The best analogy I have heard is when a building is under construction scaffolding is used to complete the construction. Once the building is completed the scaffolding is removed, it fulfilled its purpose and is no longer needed.
Paul referred to those signs as childish things for the church in the first century was in its infancy and did not have the completed NT as we do today. But upon completion of the NT childish things are put away. The mature church today has the completed NT revelation and has no need for those signs, childish things.
The NT speaks of those signs performed back in the first century and people today can believe those written down miracles....."And many other signs truly did Jesus in the presence of his disciples, which are not written in this book: 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." Jn 20:30-31
"are written" is perfect tense denoting an action that took place in the past with an abiding effect. In other words, John wrote those miracles down that took place in the past so they would still have the abiding effect of inducing belief in people today. Therefore there is no need for a repetition of these signs. To claim we need signs today undermines the reason John wrote them down.
Miracle defined would be something that goes against nature, something the forces nature cannot produce itself. Speaking in 'ecstatic utterances' is not miraculous (nor has a Bible basis).
Matt 3:11; Luke 3:16; Acts 1:5 was to the Apostles not anyone today. It was just the Apostles in Acts 1:1-5 that Christ promised baptism with the Holy Spirit, it was just the Apostles that were promised the Comforter and it was just the Apostles in Acts 2 that was baptized with the Holy Spirit and spake in tongues. There is no miraculous indwelling of the Holy Spirit today. There is no baptism with the Holy Spirit today for has been long fulfilled and ceased. The one baptism (Eph 4:4-5) in effect today is the human administered water baptism of Christ's great commission. Mt 28:19-20. Those today who claim tongue speaking and baptism with the Holy Spirit cannot provide any objective proof Biblical proof that it is taking place today.
Hebrews 2:1-4 are warnings against neglecting salvation. Tongues is a part of those Spiritual gifts from the Holy Spirit, 1 Corinthians 12:10. Not any one of these gifts in 1 Corinthians 12:1-11 have ever ceased to exist. It's not a Pentecostal thing, but that which has been given to everyone beginning on the day of Pentecost. All these gifts are for the lifting up and edifying the body of Christ.
It is Dispensationalist, Cessationism and Reformers like John Calvin that brought about this view that speaking in tongues, prophecy and healing ceased with the Apostolic Age. I know they have not ceased as I have received these gifts through the Holy Spirit and have used them within the body of Christ as another gave the interpretation and also use the gift of tongues in my prayer time.
None of these Spiritual gifts have ceased in the true church being the body of Christ with He being the head of the Church. In the upper room on the day of Pentecost there were around 120 people gathered in that room and they were all baptized in the Holy Spirit with the evidence/sign of speaking in tongues.
How can things in the first century have an abiding effect today causing belief if no one today experiences and exercises these gifts of the Holy Spirit, especially within the workings of the Church. What about the power of prayer as we see signs of the power of God. It is only Cessationalist and Dispensationalist that believe God only worked through His Apostles and since they are dead then all the gifts died with them. This is not what is taught in scripture.
Acts 2:16 But this is that which was spoken by the prophet Joel;
Acts 2:17 And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
Acts 2:18 And on my servants and on my handmaidens I will pour out in those days of my Spirit; and they shall prophesy:
After Peter was done preaching to the crowd on the day of the Feast of Pentecost:
Acts 2:37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
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.
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.
Two baptisms as one being baptized in the name of Jesus for the remission of sin and the second being baptized in the Holy Spirit with the evidence of tongues.
Beginning at Acts 1:5 Jesus was talking only to the disciples in the upper room before he ascended up to heaven as He said: "For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence. The indwelling of the Holy Spirit was first given to the disciples before they were commissioned to go preach to the Jews. The disciples then left the upper room and watched Jesus ascending up to heaven. When they returned back to Jerusalem from the Mount of Olives they entered back into the upper room where there was 120 assembled there and they sought who to replace Judas and Matthias was chosen.
Starting in Acts 2:1-13 we begin with the coming of the Holy Spirit as all 120 were filled with the Holy Spirit and began to speak in tongues, not just the disciples. Vs. 14-37 Peter begins his ministry speaking to te crowd that was gathered in Jerusalem on the day of the feast of Pentecost. Vs 37-41 after hearing Peter speak Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? 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. 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. And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation. Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
3000 were baptized in the Holy Spirit on the day of Pentecost. Acts 10 Peter came to Cornelius and he and his household were baptized in the Holy Spirit. Acts 19 was the third instance of believers receiving the baptism of the Holy Spirit and began to speak in tongue that occurred years after Pentecost. Acts 8 was the fourth instance of believers receiving the baptism of the Holy Spirit were the Samaritan believers who were baptized in the name of Jesus, but knew nothing of the baptism of the Holy Spirit until they heard and then received with the sign of speaking in tongues, which was a sign to Simon they received the indwelling of the Holy Spirit. The fifth instance is found in Acts 9 where we read of Saul/Paul's conversion on the road to Damascus and was indwelled with the Holy Spirit with evidence of speaking in tongues, (1 Corinthians 14:18).
The Baptism of the Holy Spirit and speaking in tongues is the evidence you have received not only the Baptism of Christ for the remission of sin , but also have been Baptized in the Holy Spirit. If you have the indwelling of the Holy Spirit then you should have the Biblical evidence that goes hand in hand of speaking in tongues.
Acts 19:2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
Acts 19:3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
Acts 19:4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
Acts 19:5 When they heard this, they were baptized in the name of the Lord Jesus.
Acts 19:6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied. (Notice is also says they began to prophecy).
1 Corinthians 12:4 Now there are diversities of gifts, but the same Spirit.
1 Corinthians 12:5 And there are differences of administrations, but the same Lord.
1 Corinthians 12:6 And there are diversities of operations, but it is the same God which worketh all in all.
1 Corinthians 12:7 But the manifestation of the Spirit is given to every man to profit withal.