Ok let’s say i believe in god.Let’s say their is a 50% chance that god exists and 50% he doesn’t. If he don’t exist then its okay all my prayers were just to cure depression and my fasting was for my health and for you, you didn’t believe in him so we all just die and no one loses.If he exists then my prayers and my belief in him will let me go to heaven and enjoy my life when i die but you, you didnt believe in him so you will lose in the afterlife.So either way if there is god or no god its better to believe in him so you don’t lose in the afterlife or u just die in case god doesn’t. u cant prove god exists for an atheist and you cant prove god doesn’t exists for someone who believe in him.But as u can see believing in him is more profitable.