"Good judgmenl," says an aid Scautmasler, "cames from having lived thraugh and learned from lots of badhad judgment:"
Your patrol leader didn't become wise without making lots of little errors, but he doesn't let that discourage him. Instead, he learns all he can from each failure and then moves on. He knows that he can often learn more from his mistakes than from his successes.
If you examine the end of a log, you will see a series of rings expanding out from the center. Each ring represents a period of growth. Together, they made the tree strong and helped it withstand the worst storms.
Your experiences, both good and bad, are like those rings. Each adds a little bit to your wisdom and to the strength of your judgement. Good judgment can't be taught, but through the gathering of many experiences, it can be learned.