John Gruber wrote the following in the context of recent leadership changes at Apple, but it’s applicable to life in general. From Seriously, Apple Is Doomed:
What you want is to be (1) right more often than wrong; (2) willing to recognize when you are wrong; and (3) able and willing to correct whatever is wrong. If you expect perfection, to be right all the time, you’re going to fail on all three of those — you will be wrong sometimes, that’s just human nature; you’ll be less willing or unwilling to recognize when you’re wrong because you’ve talked yourself into expecting perfection; and you won’t fix what’s wrong because you’ll have convinced yourself you weren’t wrong in the first place.
I’ve mentioned before that the ability to admit that you’re wrong is an essential characteristic of a good designer. I maintain that some of the biggest product failures can be traced back to a refusal to recognize that the idea/design isn’t perfect.