Don't get discouraged: it is often the last key in the bunch that opens the lock. Ability may get you to the top, but it takes character to keep you there.
Working with others makes us much more than we could ever become alone
You have not taught until they have learned.
Kindness makes for much better teamwork.
Stay the course. When thwarted try again; harder; smarter. Persevere relentlessly.
I think permitting the game to become too physical takes away a little bit of the beauty.