According to Christianity Christ "died on the cross to save us from our sins". I would like to get a better understanding of the origins and mechanics of this doctrine.
Christ died for our sins, as a kind of atonement of the sins of mankind. According to Christianity I'm still a sinner. So what has changed for me practically through Christ's death and resurrection?
Or to put the question in different words: What would be the scenario / world be like if Christ's death and resurrection would not have happened?
I'm interested in the Roman Catholic viewpoint of the topic.