It's all about how you arrive at the pearly gates. You could live a sinful life of you truly redeem yourself on your dying bed; accept Jesus and free yourself of your sinful ways.

The strategy of living sinfully with last minute redemption comes with two big drawbacks. First, death could come for you at any moment - you won't necessarily have time to prepare. Second, your conviction in time of dying needs to be sincere. It would be hard to fake, and most sinners probably wouldn't even know where to start. That's why it's all but impossible for rich people to get to heaven - their minds are twisted towards justification of their inaction, and their chance of redemption is close to zero.

That's my understanding anyway, I'm an atheist from a Protestant country living in a Catholic one.