Failure? I never encountered it. All I ever met were temporary setbacks.
I was speaking with someone the other day who had recently experienced a setback in their training and was having a difficult time not turning it into a negative experience. And, as recently as this morning, I heard someone else talking about the same thing happening in regards to their training - things weren't going smoothly and they were experiencing some technical difficulties.
Listening to these stories made me realise that just because we know what we enjoy doing, it doesn't mean that it's going to be easy. There are going to be setbacks, and we are either going to work through them or give up, and if we give up, then maybe we really didn't love doing, what we were doing, as much as we thought.
Setbacks are a part of life, and I believe we define ourselves by what we do when we encounter them, not so much what we are doing when we experience them. They help us to understand what type of person we are in the face of adversity - will we rise up or roll over? And, if we rise up than that's worth celebrating because there's nothing negative to be taken from facing a difficult situation down and coming out on the other side.
So lets celebrate your setbacks because hopefully they will be your next successes!