One of the smartest things you can do is to entertain the
possibility that you may be mistaken. Because if you are
mistaken, and you're able to see it, you have the
opportunity for great progress.
There is no dishonor in being mistaken. Yet there is great
folly indeed in being so stubborn that you refuse to admit
your own mistakes.
Mistakes can be powerful teachers. By knowing firsthand what
does not work, you gain much greater understanding about
what does work, and why.
If you're not willing to accept the possibility of mistakes,
you're not going to make much headway. Though there's no
need to purposely make mistakes, there's no reason to live
in fear of them either.
Even if you are already effective, there likely are ways to
be yet more effective. Even if your mistakes are not
disastrous, there is still much that you can learn from