Why would you think baptism would mean anything other then being baptized in the Spirit by Christ, being born again? Or, water symbolizing being clean from sin, after being born of the Spirit.
I would and do think this due to the constant separation of the two words. Water and spirit are separate.
John 3:5
Jesus answered, "Truly, truly, I say to you, unless one is born of water
and the Spirit he cannot enter into the kingdom of God.
Jesus himself seperates them
Jesus is teaching Nicodemus in John 3 about being born again.
Nicodemus askes Jesus how can these things be?
9Nicodemus said to him, “How can these things be?” 10 Jesus answered him, “Are you the teacher of Israel and yet you do not understand these things?
Just like circumcision in the OT didn't save, baptism in the NT does not save. There would be no reason for Nicodemus to even think baptism would mean anything, if it did Jesus would have included it in the rest of the chapter with him.
There is plenty of reason for Nicodemus to think he means Baptism. At that time Baptism was the biggest spiritual and religious current in the Jewish/hebrew world. John was visited by people from all over to be baptized by him. John 3 also follows up this passage with more baptism passages or talks about baptism. So at this time on earth, the Baptism by John was one of the greatest matters of interest in the land.
Something else that is quite telling about this time and Baptism. The high priests of the jews and their membership came to visit John to ask if he was Christ. Because he was Baptizing, and the Jews were well aware that Christ, the foretold savior would come and baptize with water. So they first assumed that John was the Christ. Which John gladly denies. So Christ and Baptism were part of the new covenant, in the mind of the Jews at the time.
John 1:20-21
20 And he confessed and did not deny, but confessed, "I am not the Christ." 21 They asked him, "What then? Are you Elijah?" And he said, "I am not." "Are you the Prophet?" And he answered, "No." ... 25 They asked him, and said to him, "Why then are you baptizing, if you are not the Christ, nor Elijah, nor the Prophet?
Nicodemus himself just like the Pharisees in this passage would be well aware of water baptism. It was also at one point a ritual cleaning to the Jews before entering the temple, etc. (which is an important note in itself)
In these passages, John is clear to have his baptism related baptism to water, and water to baptism. Matt 3:11, Mark 1:8, Luke 3:16 John 1:26,31,33 and Acts 1:5.
(more on this and the holy spirit later, as I know you will have points to this)
Jesus goes on to teach,
13 No one has ascended into heaven except he who descended from heaven, the Son of Man. 14 And as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up, 15 that whoever believes in him may have eternal life.
Jesu is telling him the truth of who He is, and how one may have eternal life. Who ever "believes" in Him. Nothing about water baptism.
Why would you suggest an external sign saves?
Jesus says in Matt 16:16 Whosoever Believes....and...is baptized will be saved.
As for external signs, it is only in part an external sign or Witness as I prefer.
When Sau (paul)l was converted.... what was said after this...? Why would this be so important?
Act 22:16
'Now why do you delay? Get up and be baptized, and wash away your sins, calling on His name.'
So clearly Saul believed Christ, especially after all that occurred and losing his sight, and regaining it.
Saul Believed, then was baptized. It was also made pretty clear it needed to happen, and was important, nothing about a sign, but he does mention the effect! Wash away your sins, calling on his name.
Two Instances of Phillip where it becomes obvious....You Believe, and the apostles say ....baptism.
Act 8:12-13
But when they believed Philip preaching the good news about the kingdom of God and the name of Jesus Christ, they were being baptized, men and women alike. 13 Even Simon himself believed; and after being baptized, he continued on with Philip, and as he observed signs and great miracles taking place, he was constantly amazed.
Act 8:36-38
36 As they went along the road they came to some water; and the eunuch said, "Look! Water! What prevents me from being baptized?" 37 [And Philip said, "If you believe with all your heart, you may." And he answered and said, "I believe that Jesus Christ is the Son of God."] 38 And he ordered the chariot to stop; and they both went down into the water, Philip as well as the eunuch, and he baptized him.
We see the clear order here, Belive, then baptized. It seems that it's more than a sign.
Ask Paul what John 3:6 means. He tells us in Titus 3:5 (text shown below in parallels)
Paul, what is it to be born again?
"It is to experience regeneration and renewing"
What is the water we must be born of?
"It is the washing of regeneration"
What s the Spirit?
"The Holy Spirit"
What is it to enter into the Kingdom of God?
"To be saved"
Another text I believe shows this to be more than a simple sign. In this context God is now willing to act against his glory being profaned by the Israelites He tells Ezekiel what his plan is. He mentions nowhere of making a sign, but he does refer to Cleaning people of sins with water.
Eze 36:24-28
24 "For I will take you from the nations, gather you from all the lands and bring you into your own land. 25 "Then I will sprinkle clean water on you, and you will be clean; I will cleanse you from all your filthiness and from all your idols. 26 "Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh. 27 "I will put My Spirit within you and cause you to walk in My statutes, and you will be careful to observe My ordinances. 28 "You will live in the land that I gave to your forefathers; so you will be My people, and I will be your God.
It's Interesting the Order in which God touches on all of this...shall we Gander at what the apostles say that mirrors this Statement and promise of Gods?
Act 2:38
38 Peter [said] to them, "Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit.
Just like God spoke, Water cleans sins, and he will give you his Spirit. First, of course, you must believe.
Parallels are Between:
Born of God, and Regeneration and Renewing.
Water and Washing.
Spirit and Holy Spirit.
These Texts sus-out parallels and promote Baptism.
Tit 3:5
5 He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy, by the washing of regeneration and renewing by the Holy Spirit,
Eph 5:25,26
25 Husbands, love your wives, just as Christ also loved the church and gave Himself up for her, 26 so that He might sanctify her, having cleansed her by the washing of water with the word,
Heb 10:21-22
21 and since [we have] a great priest over the house of God, 22 let us draw near with a sincere heart in full assurance of faith, having our hearts sprinkled [clean] from an evil conscience and our bodies washed with pure water.
1Jo 5:6-8
6 This is the One who came by water and blood, Jesus Christ; not with the water only, but with the water and with the blood. It is the Spirit who testifies, because the Spirit is the truth. 7 For there are three that testify: 8 the Spirit and the water and the blood; and the three are in agreement.
1Pe 3:20-21
20 who once were disobedient, when the patience of God kept waiting in the days of Noah, during the construction of the ark, in which a few, that is, eight persons, were brought safely through [the] water. 21 Corresponding to that, baptism now saves you--not the removal of dirt from the flesh, but an appeal to God for a good conscience--through the resurrection of Jesus Christ,
As you can see Water and Spirit are often parallel in Salvation through Christ. Faith In God Grace towards us.
My friend, anything added to saved by grace through faith alone is salvation by works.
Baptism is a work of God. Unto our salvation. There is no work on our behalf. See Ezekiel, and Mark 16:16. We receive faith from the word/gospel which are means of God's Grace (i believe the reformed also follow this) This Grace also Bestows upon us freely, Faith. We then believe, and if we do believe we will be Baptized, and sealed in the covenant with Christ in the church. As Noah Entered the ark, he showed he believed, God sealed him in the ark (body of christ/church) and he was saved by water, or through water, depending on your translation. Was the flood water symbolic? was the red sea symbolic? or did they really save? Why would Jesus tell Nicodemus that water and spirit are how you get into the kingdom, but expect him to know water is simply a symbol? He doesn't, Jesus says Water and Spirit. This also follows God's plan set out in Ezekiel. Cleansed by Water, then spirit. This also follows the above Parallels.