Water is not baptism, that is a false accusation
jesus told nicodemus how to be born again
John 3: 14 And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, 15 that whoever believes in Him should not perish but have eternal life. 16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life.17 For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.
18 “He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God
No mention of baptism anywhere
believe then Mk 16:16 he who believes and is baptized shall be saved
Or believe those who have authority to teach the truth
Teaching authority of the Apostles and their successors in the church founded in the one true founded by Jesus Christ!
Jesus Christ is the head of the church, (eph 5:23) the body of Christ,
(col 1:18) the new and eternal covenant, (pre-figured Jer 31:31) (Heb 8:8) new covenant replaces the Mosaic covenant, (Heb 8:13) Christ replaces David as king, (Lk 1:32-33) Jesus Christ is the only mediator between God and men, (1 Tim 2:5 & Heb 12:24) but a mediator remains on earth mediating between God and His people, but Christ ascended to heaven, (acts 1) before He did He founded His church, on Peter, and the apostles, and their successors!
Mt 16:18 Mt 28:19 Acts 1:17 acts 2:42 acts 8:31 & 35 Lk 10:16 Jn 8:32 Jn 13:20 Jn 16:13
Jn 20:21-22 eph 2:20
We must be taught by Peter, the apostles, and their successors! Lk 10:16 Matt 28:19 Jn 21:17
Matt 28:19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Lk 1:4 That thou mightest know the certainty of those things, wherein thou hast been instructed.
Acts 8:30 And Philip ran thither to him, and heard him read the prophet Esaias, and said, Understandest thou what thou readest?
31 And he said, How can I, except some man should guide me? And he desired Philip that he would come up and sit with him.
Col 2:7 Rooted and built up in him, and stablished in the faith, as ye have been taught, abounding therein with thanksgiving.
'The Father has set his seal' on Christ (John 6:27) and also seals us in him (cf. 2 Corinthians 1:22; Ephesians 1:23, 4:30). Because this seal indicates the indelible effect of the anointing with the Holy Spirit in the sacrament of Baptism,
Baptism indeed is the seal of eternal life." 87 The faithful Christian who has "kept the seal" until the end, remaining faithful to the demands of his Baptism, will be able to depart this life "marked with the sign of faith," 88 with his baptismal faith, in expectation of the blessed vision of God - the consummation of faith - and in the hope of resurrection.
St. Paul tells the faithful at Ephesus that they have been “sealed with the promised holy Spirit.” Understand this in terms of an indelible character imprinted on the soul in the sacrament of baptism. We are enabled to participate in Christ’s mission and in his offices of priest, prophet, and king.
St. AUGUSTINE
“There are three ways in which sins are forgiven: in baptism, in prayer, and in the greater humility of penance; yet God does not forgive sins except to the baptized” (Sermons to Catechumens on the Creed 7:15 [A.D. 395]).