For many people, the gospel has strings attached: you can be saved by grace, but after that you have to work really hard. But the true gospel is that Christ died for all sins: past, present, and future. God is not keeping a record of how many wrong things you do. Does this mean that you can sin all you want? Yes. You always have, and always will. God wants to save you from your sins, and he has already sent Jesus to take care of the problem. The door to the palace is open - no charge, no fees. But are we willing to go in? Do we really want what God offers, or do we prefer the pointless existence we already have? And furthermore, what about people who never heard of Christ? Does God let himself be thwarted by our failure to reach them before they die?
