"Fail. Fail again. Fail better."
This advice was reportedly posted on Samuel Beckett's wall beside his desk. Any worthwhile pursuit --- gardening, cooking, drawing, writing, thinking, teaching, learning, ... --- is never done to perfection. There is always room for improvement, a shortfall to correct, an error to identify and fix.
That's precisely what makes something worthwhile: inevitable failure, plus the golden chance to try again, and to do better next time. Living is like that.
(correlates: OnSolitude, SeizeTheCarp, LoseTrack, ...)