A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.
BEST, A FAILURE IS NOT ALWAYS A MISTAKE
Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.
In times of great stress or adversity, it's always best to keep busy, to plow your anger and your energy into something positive.