I need explanations please about baptism

[panevino]

"There are some people who believe that baptism is necessary for salvation.

While the Bible clearly teaches that baptism in water is necessary for obedience, it is not a requirement for salvation. …

…Baptism is going public for God. It is telling the world that you’ve decided to follow Jesus."

jesus says the following in john 3:3-7 (KJV)
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. 4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother’s womb, and be born? 5 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. 6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. 7 Marvel not that I said unto thee, Ye must be born again.

early church interpretations

Shepard of hermas (~140AD) “It was necessary for them,” saith he, "to rise up through water, that they might be made alive; for otherwise they could not enter into the kingdom of God, … The seal then is the water: so they go down into the water dead, and they come up alive. “thus to them also this seal was preached, and they availed themselves of it that they might enter into the kingdom of God.”

For as we are lepers in sin, we are made clean, by means of the sacred water and the invocation of the Lord, from our old transgressions; being spiritually regenerated as new-born babes, even as the Lord has declared: ‘Except a man be born again through water and the Spirit, he shall not enter into the kingdom of heaven.’" Irenaeus, Fragment, 34 (A.D. 190).

 

[diggerdomer]

I don’t think so, digger. Either one accepts the testimony of history and literary criticism that the Didache is an early church document that represents the Teaching of the Apostles, or not. If you cannot accept this, then you will probably not accept that any of the contents of the document portray and accurate representation of what the Apostles did and taught.

Yes, Tertullian did argue against it, because it was the standard practice in North Africa since the time the Apostolic message came there. Why did he do so?

Tertullian, treatise on BAPTISM 18,4 (c. AD 200-206)

"According to circumstance and disposition and even age of the individual person, it may be better to delay Baptism; and especially so in the case of little children. Why, indeed, is it necessary – if it be not a case of necessity – that the sponsors to be thrust into danger, when they themselves may fail to fulfill their promises by reason of death, or when they may be disappointed by the growth of an evil disposition? Indeed the Lord says, ‘Do not forbid them to come to me’ [Matt 19:14; Luke 18:16].

“Let them come, then, while they grow up, while they learn, while they are taught to whom to come; let them become Christians when they will have been able to know Christ! Why does the innocent age hasten to the remission of sins? …For no less cause should the unmarried also be deferred, in whom there is an aptness to temptation – in virgins on account of their ripeness as also in the widowed on account of their freedom – until they are married or are better strengthened for continence. Anyone who understands the seriousness of Baptism will fear its reception more than its deferral. Sound faith is secure of its salvation!”

Tertullian also embraced the Apostolic teaching that it is possible to fall away from the faith, to sray from grace, and therefore fail to obtain one’s inheritance.

And this relates to the Didache how?