Actually, SBC believes that Baptism has nothing whatsoever to do with salvation! :) God commands baptism and so it is very important. We see it as a public obedience to Him. From the BFM:
Christian baptism is the immersion of a believer in water in the name of the Father, the Son, and the Holy Spirit. It is an act of obedience symbolizing the believer's faith in a crucified, buried, and risen Saviour, the believer's death to sin, the burial of the old life, and the resurrection to walk in newness of life in Christ Jesus. It is a testimony to his faith in the final resurrection of the dead. Being a church ordinance, it is prerequisite to the privileges of church membership and to the Lord's Supper.
Perhaps surprisingly, THAT'S the entire section on baptism. There's nothing about salvation. Now, concerning grievous sin, as the quote says, we believe that God promises us that those who are truly His will persevere to the end under His guarantee. One real possibility is that if someone is so obstinate in his sinning, but he is nevertheless a true believer, God will simply "take him home" if you get the drift. :) Presumably this would take care of the serial killer problem.
What does impaired grace and comfort mean?
It just means that when we step out of line here on earth, that God will discipline us back into line. God sustains us in all things, so for example, if I start stealing from the boss, then God might "artificially" make things happen for me to be found out, when I would have normally gotten away with it. I'll lose the grace and comfort of my job. "Grace" is not used in the salvational sense here.
Three times MarkBsnr, three times, not once. One-time immersion is invalid baptism.
FWIW, in the discussion about Angels procreating I happened to read this:
1 Peter 3:21 There is also an antitype which now saves us-baptism (not the removal of the filth of the flesh, but the answer of a good conscience toward God), through the resurrection of Jesus Christ,
I’m a little puzzled.
Does this mean that baptism is nice but not necessary, and sins will be paid for not in the next world but only in this? Would that not mean that Paris Hilton is as pure as the driven snow?