I’m not a big fan of mantras, but I am a fan of this one: be kind, and be useful.
I originally encountered it in a fun interview Barack Obama did with Bear Grylls (a nature adventurer). When asked what advice Obama gives his daughters, he rhymed off this mantra: they should be useful, and be kind.
It’s a piece of advice that’s simple, easy to remember and internalize, and one that helps you consider other people as you act and make decisions. And it’s a nice reminder to consider what you’re able to contribute to any situation.
As far as sayings go, it’s a pretty good one to live by.