Compete externally and you compare. Compete internally and you improve. - James Clear

If your past achievements didn't make you meaningfully happier, don't expect your future achievements to make you happier.

Remember that thing you so badly wanted? If getting it didn't meaningfully change your long-term happiness, then you shouldn't expect the thing you want right now to change your long-term happiness either.

You are roughly as happy as you decide to be today. And some day, years from now, after you accomplish the thing you've been striving for, you'll have to decide to be happy on that day too.

People get so caught up in the fact that they have limits that they rarely exert the effort required to get close to them.

Even bad luck is a source of opportunity—but only if you live each day as if that is true.