There are 1,000 lessons in defeat. But only one in victory.
The gem cannot be polished without friction nor man without trials.
Bird in hand makes it harder to blow nose.
Study as if you have not reached your goal - hold it as if you were afraid of losing what you have.
In archery we have something like the way of the superior man. When the archer misses the center of the target, he turns round and seeks for the cause of his failure in himself.
Even in killing men, observe the rules of propriety.