This is an issue that raises lots of conflict within the Christian community. Baptism or 'birth of water and spirit', so it is referred to, is meant to symbolize the death, burial, and resurrection of your old self to new; like that of Jesus Christ. Throughout the bible there are countless references and or instances of baptism, or 'birth of water and spirit'. Let's take a look at some.
Here is a perfect example in John. After Jesus arrives in Jerusalem, shortly before the Passover, he clears all the men who were selling goods and exchanging money out of the temple, and when they asked for a miraculous sign to prove His authority, He tells them, "Destroy this temple, and I will raise it again in three days." After hearing and seeing of this Nicodemus comes to talk with Jesus.
John 3:1-5
Now there was a man of the Pharisees, named Nicodemus, a ruler of the Jews. This man came to Jesus by night and said to him, "Rabbi, we know that you are a teacher come from God; for no one can do these signs that you do, unless God is with him." Jesus answered him, "I tell you the truth, unless one is born anew, he cannot see the kingdom of God." Nicodemus said to him, " How can a man be born when he is old? Can he enter a second time into his mother's womb and be bon?" Jesus answered, " I tell you the truth, unless one is born of water and the Spirit, he cannot enter the kingdom of God.
You cannot deny this scripture! Christ says here plainly you cannot enter the kingdom of God unless you are born of water and spirit.
Stay with me now. In Acts 2:38-41 Peter is addressing all the people of Jerusalem and basically tells them (in Acts 2:22-24), "Oh uhh.. hey by the way, that guy you just had put to death, yeah He's the Savior of the world, God's only son. Good job!" And when they heard this, scripture says they were 'cut to the heart' asking, "What do we do now?" Peter's response was (in verse 38):
"Repent, and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins; and you shall receive the gift of the Holy Spirit. For the promise is to you and to your children and to all that are far off, every one whom the Lord our God calls to him."
Wait a sec! These people are responsible for the death of Christ! They had Him put to death! But God's grace is so amazing that He offers them forgiveness and the gift of the Holy Spirit through 'birth of water and spirit' or baptism. Scripture says that about 3 thousand people accepted Peter’s message that day and were baptized into Christ. How awesome is that?!?!
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Now for those who have taken the initiative to believe and confess to the belief that Christ is our risen savior, DON’T STOP THERE! Be born again and commit yourself to your belief. God is standing on the other side, calling to you. Give Him your burdens. Cast your cares on Him. He is offering Himself to you through the gift of the Holy spirit, which is given only through what? A new birth. My challenge to you after reading this, is to consider this message and how it affects you. Are you prepared and willing to take up your walk with Christ? He is waiting for you.