On similar lines, the anecdote at the beginning of this speech - https://www.princeton.edu/news/2010/05/30/2010-baccalaureate... -changed my life too. Since then I’ve been trying to follow - it’s harder to be kind than clever.
So many cringe-inducing interactions where I was a total jerk just to come off as the smarter guy. Feels awful and I strive to not behave like that anymore. This quote serves as an anchor.