1 John 5:13Authorized (King James) Version (AKJV)
13 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
But then again, what do I know? Faith is a choice.
Doubt is the natural condition of mankind. Certainty gives us horrors for the most part, like islam. They are just as certain as you that killing a kaffir will send them to heaven in a suicide attack.
Doubt. That’s what’s important.