If one has made Jesus both Lord and Savior you have been baptized with HIS SPIRIT.
ref:
Luke 3:16
16 John answered, saying unto them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire:
KJV
ref:
Acts 1:5-8
5 For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence.
6 When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?
7 And he said unto them, It is not for you to know the times or the seasons, which the Father hath put in his own power.
8 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.
KJV
In response to that their are two ordiances in the church. Water Baptism and Communion.
Water Baptism is a outward expression of inward change.
ref:
Rom 6:4-8
4 Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
5 For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection:
6 Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin.
7 For he that is dead is freed from sin.
8 Now if we be dead with Christ, we believe that we shall also live with him:
KJV
Does the water in itself do anything?
ref:
1 Peter 3:20-21
20 Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water.
21 The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ:
KJV
Who is this for?
ref:
Acts 2:38-42
38 Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. 39 The promise is for you and your children and for all who are far off-for all whom the Lord our God will call."
40 With many other words he warned them; and he pleaded with them, "Save yourselves from this corrupt generation." 41 Those who accepted his message were baptized, and about three thousand were added to their number that day.
42 They devoted themselves to the apostles' teaching and to the fellowship, to the breaking of bread and to prayer.
We are not water baptized to be saved but because we are saved we follow the first command he gave us after we are saved and have been sealed with the Holy Spirit of promise.
ref:
Eph 1:13
13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that Holy Spirit of promise,
KJV
It is HIM that works in us both to will and to do HIS good pleasure.
ref:
2 Tim 1:12-14
12 For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day.
13 Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.
14 That good thing which was committed unto thee keep by the Holy Ghost which dwelleth in us.
KJV
Conclusion:
Gal 2:20-21
20 I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me.
21 I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
KJV