Regretting things you have done is different to regretting things you haven't done.
If you regret nothing you have done at the end of your life it probably means you never made any serious, life-ruining decisions or you were incredibly lucky. That in itself is something to contemplate long and hard (luck or tragedy). Significant risks come with significant ramifications and sometimes taking a risk doesn't work out. Perhaps the question if you never took such risks is would your life be any different if you had taken the riskier path.
You don't walk away from accidentally killing someone or destroying their life with just a "whoops" unless you have something seriously wrong with you.
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Regretting things you have done is different to regretting things you haven't done.
If you regret nothing you have done at the end of your life it probably means you never made any serious, life-ruining decisions or you were incredibly lucky. That in itself is something to contemplate long and hard (luck or tragedy). Significant risks come with significant ramifications and sometimes taking a risk doesn't work out. Perhaps the question if you never took such risks is would your life be any different if you had taken the riskier path.
You don't walk away from accidentally killing someone or destroying their life with just a "whoops" unless you have something seriously wrong with you.