Vince Lombardi said that, and he was right. Are you committed to excellence in everything you think and say and do?
Ah, yes, it is about thoughts and words, too, not just about actions.
Are you thoughts and words excellent? And your actions, too?
This does not mean that you must be without errors, by the way, but only that you must seek to correct them.
Do not confuse “excellence” with “perfection“. The first is possible to achieve, the second is probably not.