An attitude of wisdom

"Be Confident enough to act on the best knowledge you have now;
Humble enough to doubt what you know; and
Wise enough to face the hard facts when better evidence comes along."

This is from the book, Hard Facts, by Jeffrey Pfeffer and Robert Sutton, which talks on Evidence-Based Management.

I guess this would be the businessman's version of the Serenity Prayer , which states -
God grant me the serenity to accept the things I cannot change;
courage to change the things I can;
and wisdom to know the difference.