Eternal Security - Once Saved, Always Saved?

Can we lose our salvation or are we guaranteed a seat at Heaven's feast if we walk an aisle, repeat a prayer, and get "dunked" but then live any way we like?If we sin and immediately die, are we bound for hell or is it that it doesn't matter what we do as long as we can tell Saint Peter at the pearly gates that we did more good than bad in our lifetime?There's opinion and there's the Biblical truth. And the key word in this whole podcast is what God's opinion is about being "saved." Some people live in fear of God rejecting them while other people set their own standard of right and wrong and expect God to agree.Knowing the truth settles the issue.