If souls do not exist then we just try to live the best life we can.
If souls do exist then we just try to live the best life we can.
Not necessarily.
So why worry or even ask whether or not they exist?
Because knowledge has power to change us. If you suddenly become privy to the fact that there is a bomb on your bus, you might behave differently (say get off the bus) than if you did not know this. In the same way, if you know that your being continues its existance after death in the form of a soul, you also might begin to act differently.
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