Isn't there a difference between inner and outward baptism? One is the work of God's Spirit, the other an outward symbolism. Inner baptism takes place upon conversion by salvation by grace through faith alone.
Is Jesus ultimately talking about inner baptism here in John 3? I want to be careful, but i think this is true.
Joh 3:5 Jesus answered, "Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.
Joh 3:6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.
OT Reference of the work of regeneration
Eze 36:25 I (God) will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you.
Eze 36:26 And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone
Tit 3:5 he saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit,
Eph 5:25 Husbands, love your wives, as Christ loved the church and gave himself up for her,
Eph 5:26 that he might sanctify her, having cleansed her by the washing of water with the word,
Act 15:8 And God, who knows the heart, bore witness to them, by giving them the Holy Spirit just as he did to us,
Act 15:9 and he made no distinction between us and them, having cleansed their hearts by faith.
1Co 6:11 And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.
Heb 10:22 let us draw near with a true heart in full assurance of faith, with our hearts sprinkled clean from an evil conscience and our bodies washed with pure water.
Is not inner baptism the work of the Holy Spirit in regeneration, when a person places saving faith in Jesus Christ, in all that He is, His righteousness, blood, propitiation,life death and resurrection, Prophet, Priest, King all that He is. This work changes the heart, it makes new, cleanses, washes. Signifys the death of self and the new life of Christ.
I definately believe a christian should be outwardly baptized as well but it isn't the saving factor. Anyone can pour water on a person, but on the Holy Spirit can make a dead, sinful heart alive and pure! I don't know why anyone who has been saved wouldn't want to be outwardly baptized as a symbol of what has happened in the soul. But I also know that there are many who have be outwardly baptized who live just like the world.