Can unsaved person be baptized in the Holy Spirit?
Just as you freely accepted Jesus in your life you can also freely choose to stop serving him. Jesus said with his own mouth; (Matt. 24:13) But he that shall endure unto the end, the same shall be saved. That is until the end of your life, or until the Second Coming of the Lord.
If we truly love God, then we will obey "
Every word" that proceeds out of his mouth (Matthew 4:4). Baptism is one of those words. In order to be baptized, certain events must take place: You must repent, give up a lifestyle where sin has dominion, (ruler ship) over you. Sin according to 1 John 3:4,
Whosoever committeth sin transgresseth also the law: for sin is the transgression (breaking) of the law. You must be taught "The Word", before you can adhere to God's commandments (judgments\statues). These laws are found in the Holy Bible; beginning with Genesis and ending with Revelation. You must believe what the bible says and finally, you must confess that Jesus is Lord. Once this has been accomplished, you are qualified to be baptized in the name of Jesus. So when you get baptize in the name of Jesus for the remission, your journey just began.
But Paul said in (1 Cor. 15:1-2) (v.1)
MOREOVER, brethren, I declare unto the gospel which I preached unto you, which also ye have received, and wherein ye stand; (v.2)
By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. Paul is telling you right here that you are saved by the gospel that he preached unto you if you keep it in memory. So what happens if you don’t keep it in memory? Then you have believed in vain you have believed for nothing that’s what vain means.