That's why I said you use scripture to intepret scripture. If it says you that baptism is apart of salvation and there some confusion as to what it's saying, see what the rest of the scriptures say and use that to intepret it.
That's still basically the same thing. Meaning by referring to another scripture to interpret the scripture in question, you're still referring to someone else's interpretation of a message they received.
Basically it boils down to faith in what you believe.