An amateur takes failure personally and often builds it into a case for why he’s not a success.
A professional sees failure as an idea that didn’t work and she builds it into a case for further research and ultimately another attempt.
Important because the fact that our attempt failed is not a reflection of our worth as an artist or entrepreneur...or a human being. Just because you haven’t figured out a successful way of doing something (yet) doesn’t mean you are a failure. The idea just didn’t work. It’s a failure—and failures can be fixed.