In the 'normal' way of looking at sin, it is kinda like karma, but punishable from a wrathful deity who sees mortal sins as offenses immediately punishable by banishment to Hell. As such, a belief in that wrathful nature of God is required first. I guess from the Acrosstic above, you can see I don't...
Heaven however I do believe in, since I see it as a place of mindful silence, of being content. It goes towards that point where meditation isn't even needed to remain in there, you naturally see your world as painless, even when others see it as having setbacks they would have trouble dealing with.