At target practice, each shot was either a hit or a sin. If you sinned, you made corrections and tried again. Some people treat mistakes with the same reverence. Mistakes are valuable if, for no other reason, they show us what not to do. Now let's get ready for take two.
Stars do it.
Mistakes are the portals of discovery. They're a natural part of the learning process. What the person meant, I think, is that growth, discovery, and expansion have mistakes built into them. To avoid situations in which you might make mistakes may be the biggest mistake of all. The best things and best people rise out of their separateness.