We do know that before a person could be baptized with water that person must first believe, as witnessed by the following exchange between Philip and the eunuch:
"And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized? And Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God" (Acts 8:36-37).
Before the eunuch was baptized with water he received life when he believed that Jesus is the Christ, the Son of God:
"But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name" (Jn.20:31).
The eunuch received life and was saved before a drop of water touched him!
The wicked Saducees knew Jesus was the Christ the son of God and that did not make them to be saved.--
Mat 21:33 Hear another parable: There was a certain householder, which planted a vineyard, and hedged it round about, and digged a winepress in it, and built a tower, and let it out to husbandmen, and went into a far country:
Mat 21:34 And when the time of the fruit drew near, he sent his servants to the husbandmen, that they might receive the fruits of it.
Mat 21:35 And the husbandmen took his servants, and beat one, and killed another, and stoned another.
Mat 21:36 Again, he sent other servants more than the first: and they did unto them likewise.
Mat 21:37 But last of all he sent unto them his son, saying, They will reverence my son.
Mat 21:38 But when the husbandmen saw the son, they said among themselves, This is the heir; come, let us kill him, and let us seize on his inheritance.
Mat 21:39 And they caught him, and cast him out of the vineyard, and slew him.
Jesus gave witness of who He was for over three years and that did not make all the people saved.
Act 10:36 The word which God sent unto the children of Israel, preaching peace by Jesus Christ: (he is Lord of all
Act 10:37 That word, I say, ye know, which was published throughout all Judaea, and began from Galilee, after the baptism which John preached;
Act 10:38 How God anointed Jesus of Nazareth with the Holy Ghost and with power: who went about doing good, and healing all that were oppressed of the devil; for God was with him.
Act 10:39 And we are witnesses of all things which he did both in the land of the Jews, and in Jerusalem; whom they slew and hanged on a tree:
Act 10:40 Him God raised up the third day, and shewed him openly;
Act 10:41 Not to all the people, but unto witnesses chosen before of God, even to us, who did eat and drink with him after he rose from the dead.
Act 10:42 And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead.
Act 10:43 To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins.
Salvation believing is not just knowing who Jesus is.
Simon the sorcerer also believed but he was not saved by it.
Act 8:13
Then Simon himself believed also: and when he was baptized, he continued with Philip, and wondered, beholding the miracles and signs which were done.
Act 8:14 Now when the apostles which were at Jerusalem heard that Samaria had received the word of God, they sent unto them Peter and John:
Act 8:15 Who, when they were come down, prayed for them, that they might receive the Holy Ghost:
Act 8:16 (For as yet he was fallen upon none of them: only they were baptized in the name of the Lord Jesus.)
Act 8:17 Then laid they their hands on them, and they received the Holy Ghost.
Act 8:18 And when Simon saw that through laying on of the apostles' hands the Holy Ghost was given, he offered them money,
Act 8:19 Saying, Give me also this power, that on whomsoever I lay hands, he may receive the Holy Ghost.
Act 8:20
But Peter said unto him, Thy money perish with thee, because thou hast thought that the gift of God may be purchased with money.
Act 8:21 Thou hast neither part nor lot in this matter: for thy heart is not right in the sight of God.
Act 8:22 Repent therefore of this thy wickedness, and pray God, if perhaps the thought of thine heart may be forgiven thee.
Act 8:23 For I perceive that thou art in the gall of bitterness, and in the bond of iniquity.
LA