The idea is that if you can internalize your acceptance of mortality, you will make better life decisions.
Living like you're immortal until you're not is how people end up on their death bed regretting how they spent their time on earth. Like arguing on HN instead of calling your mother.
Living like you're mortal, to me, suggests someone who lives in the moment and maximizes their life fulfillment. Not someone who lives in fear of death, which I'd argue is why we spend so much time living like we're immortal.
Living like you're immortal until you're not is how people end up on their death bed regretting how they spent their time on earth. Like arguing on HN instead of calling your mother.
Living like you're mortal, to me, suggests someone who lives in the moment and maximizes their life fulfillment. Not someone who lives in fear of death, which I'd argue is why we spend so much time living like we're immortal.