Being poor is not having too little, it is wanting more
"The day you started lifting is the day you became forever small, because you'll never be as big as you want to be" - Dom Mazzetti
We often strive after these sort of unobtainable things that are really never-ending voids of desire. Physical attractiveness, sex, money, fame, status. Although a few people can balance the striving of these things well, it is much more likely that thinking you need more of any of these is a desire that will stay unfulfilled regardless of how much of it you get.
Wanting more causes pain, getting more doesn't satisfy, and the only way to have enough is to accept having however much you already have.
TLDR:
Desire = Suffering
References:
The Almanack of Naval Ravikant
If you love money, and you make it, there’s never enough. There is never enough because the desire is turned on and doesn’t turn off at some number. It’s a fallacy to think it turns off at some number. -- Eric Jorgenson, The Almanack of Naval Ravikant: A Guide to Wealth and Happiness, loc. 826-28