The bible has a lot to say about what you must do to be saved. I’m not going to list them all here (that would make for a very long post), but the various books of the bible list about 200 different hoops through which one must jump in order to be saved, including burning your life’s work and never getting married. In order to make your way to heaven, you have to lead a fairly miserable life. But it’ll all be worth it in heaven, right? Every ounce of suffering you feel in your devotion to god will make paradise all the more wonderful, right? Your actions here on earth in this life have a direct effect on the afterlife, right?
It turns out that Peter wrote a couple books of the bible, which is no easy feat considering he was illiterate. In his first book, Saint Peter is very blunt about who is saved and who is damned. That is, god predetermines who goes to heaven and who doesn’t:
Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied.
In other words, despite your acts, your beliefs, and your faith–despite anything you do–god has made up his mind about your fate before you were even born. You have no say in the matter. His foreknowledge makes anything you do irrelevant in regards to your immortal soul.
This pretty much means that you’re wasting your life if you try to adhere to the almost-200 different rules for getting to heaven. Since god has already decided your fate, there’s no point in trying to please him.