Why is it that most people are okay with not existing before they were born but are frightened at the thought of no longer existing after death? I have no memory or knowledge of a "before" life, so that must mean there is no "after" life, either.
But then again, the thought that *this* is the only life we get is pretty depressing.
Deep down, in our heart of hearts, we all know that we (individually, I mean) have done wrong. This sense of right and wrong is built in, so we all have this ruler by which we automatically measure and judge our own behavior. We accuse ourselves or excuse ourselves, but we always analyze ourselves and others (“I’m not as bad as Hitler,” for instance.) We all know we haven’t done as well as we should have, and we know that doing badly should require punishment.
“It is appointed man once to die, and after this, the Judgement” haunts us and rings in our ears even if we claim we don’t believe it. Inside, we know it's true. We know the judgement is coming and that it will turn out badly for us, so we fear death.
We might tell ourselves ‘there is no judgment,’ ‘there is no afterlife,’ but when we do, our internal sense of justice tells us if that were true, Hitler and Pol Pot would have got away with it, so we know that can’t be the right answer.
Maybe you tell yourself you’re better than some others, and so the judgment will (magically) turn out ok. Or maybe you say “if my ‘good’ outweighs my ‘bad’ I’ll be ok.” But those are rules you made up yourself, and since you’re not the judge, you have no reason to think that works.
The trick is, that you must find out what the Judge requires of you. And here it is: “Therefore, you be perfect even as your Father in Heaven is perfect.” (Jesus said that.)
A tough order? Yes. Impossible? Yes, for you, and impossible for me too. But I believe God provided a way for us. It involves:
Turning from your bad behavior, as best as you know how
Turning toward God and letting Him rule your life, as best as you know how
Trusting that Jesus' sacrifice was sufficient to save you from that upcoming judgement.