If there’s no Heaven then you might as well get yours now. Get all your money. Get all your honor. Get all your power. Get all your good times in now before you die. Screw everyone else.
But if there’s a Heaven you’re doing it somewhat backwards. You’re called to give to the poor, to give away praise, raise others up, and counteract pleasure with restraint. Charity, humility, meekness, and temperance. You’re called to a life of the classical virtues.
You can look at the behavior of a country, city, town, or individual and pretty quickly discern if they think there’s a Heaven or not.