We often say that the biggest job we have is to teach a newly hired employee to fail intelligently... to experiment over and over again and to keep on trying and failing until he learns what will work.
We need to teach the highly educated man that it is not a disgrace to fail and that he must analyze every failure to find its cause. He must learn how to fail intelligently, for failing is one of the greatest arts in the world.
You will never stub your toe standing still. The faster you go, the more chance there is of stubbing your toe, but the more chance you have of getting somewhere.