"don't chase what you can't catch"
But how do you know if it's not catchable if you never begin the chase?
Not everything that seems out of reach is unreachable.
There are life lessons to be learned in failure.
I also know that I said in an earlier entry to save your energy for the battles (or chases) that you can win. But there isn't a hard and fast set of rules to determine which are the situations you'll avail. Sadly, you must fail in order to have a chance to know where you will succeed. But have faith, strength, go forward and challenge yourself, or else you'll just end up stuck in the past and remain stagnant.
It is part of the human condition to go after what we cannot get.
In fact to not chase what you can't catch, is well...to be not human.
"Why be born again, when you can just grow up?" - Anonymous quote on religion.