Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. John 3:5
The first one is water baptism. In this scripture, Jesus is talking about water baptism and spirit baptism. According to the bible thrugh the words Jesus spoke both are necessary requirements to enter the kingdom of heaven. To be immersed (baptized) in water is the outer symbolic act of accepting Jesus as our Lord and Savior; being fully aligned with him by being buried with Jesus and having our sins washed away to come up out of the water a new creature - just as Jesus came out of the grave a new creature. At the start of the church age, it was important that people were no longer baptised under John's baptism but under the commandment which Jesus had given the disciples.
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 2:38
The second baptism is the baptism of the Holy Spirit. When a person comes to Jesus Christ, they receive Christ into thier heart. The Spirit of God comes and joins with the spirit of the believer. This "indwelling Spirit" reproduces the life of Jesus in the believer's life.
And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever; (John 14:16)
[Even] the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you. I will not leave you comfortless: I will come to you. (John 14:17-18)
But the Comforter, [which is] the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you. (John 14:26)
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. (Acts 2:38-39)
And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost. (Act 10:45)
In the last day, that great [day] of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water. (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet [given]; because that Jesus was not yet glorified.) He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water. (John 7:37-39)
But what saith it? The word is nigh thee, [even] in thy mouth, and in thy heart: that is, the word of faith, which we preach; 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. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. For the scripture saith, Whosoever believeth on him shall not be ashamed. For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him. For whosoever shall call upon the name of the Lord shall be saved. (Romans 10:8-13)
For as many as are led by the Spirit of God, they are the sons of God. (Romans 8:14)
He that believeth and is baptized shall be saved; but he that believeth not shall be damned. And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; (Mark 16:16)
Then laid they [their] hands on them, and they received the Holy Ghost. (Acts 8:17)
To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins. (Act 10:43)
While Peter yet spake these words, the Holy Ghost fell on all them which heard the word. (Act 10:44)
For they heard them speak with tongues, and magnify God. Then answered Peter, Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days. (Act 10:46-48)
And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism. 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. When they heard [this], they were baptized in the name of the Lord Jesus. And when Paul had laid [his] hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied. And all the men were about twelve. (Act 19:3-7)
The baptism in the Holy Spirit is an empowering for service that takes place in the life of the Christian. In it we are immersed in the Spirit's life and power.
But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth. (Acts 1:8)
The Holy Spirit is so much more than a shadowy figure to pay lip-service to on Sunday morning. He can be with you and in you to bring new life to your Christian walk. Likewise, the baptism in the Holy Spirit is more than a single experience. It is a continual dependence on the Spirit for guidance and strength in all circumstances.
"If we live by the Spirit, let us also walk by the Spirit" (Galatians 5:25)