That quote came from all places the Family Circus comic. How true. If you want something to happen you must take the risk that you'll fail. But don't look at it as failing. It's NOT failing. It's learning. You're just on a learning curve. The most successful people in the world had a lot of failures before they became successful. They had to. It was a learning process. Without those learning experiences, they never would have become who they are today.
And remember what Don Shula said, "Success is not forever and failure is never fatal."