I struggle with this sometimes. There is a part of me that cares greatly about "legacy" and would really like to accomplish something significant in my lifetime

I struggle with this sometimes. There is a part of me that cares greatly about "legacy" and would really like to accomplish something significant in my lifetime... something that will be remembered, something that will matter. But. I am reminded that, over sufficiently long time scales, no one is remembered. There is no such thing as "legacy", really. As somebody pointed out once: how many people are remembered now from even, say, the last 2500 years? Alexander the Great, and, uh... maybe a handful more. But will even Alexander the Great, or Napoleon, or Genghis Khan, or Albert Einstein, or Ramanujan, or Marie Curie, or $INSERT_CELEBRITY_HERE be remembered in another 2000 years? 10,000? 100,000? 2 million? 10 million? It seems likely (assuming the human race even persists that long) that we're all forgotten in the end. So I dunno. I still go back and forth in my own mind about whether or not "legacy" is even worth caring about or not.