There is no such thing as failure; merely feedback.
Slip-ups are inevitable.
The difference between someone who succeeds and someone who doesn’t is the way she reacts to it.
Successful people look at it as a setback. Yes, they might be frustrated. No, they aren’t happy about it. But, they realize that they can go at it again after making some changes.
People who do not achieve their goals “freak out” when things don’t go the way they want. They look at it as failure and the end of the road. The immediately follow up thought to that is, “As long as it didn’t work, why bother to keep trying?” They quit.