I love this article from Sal Khan of Khan Academy. He talks about praising his son; not when he's succeeded with something he can already do, but instead when he perseveres with something challenging or difficult.
We have grown up in a society that fears failure. If you have heard the quote, "Failure is not an option," then you know what I mean. However, failure is not something to be feared. It is a natural part of learning. The brain actually grows and builds new connections when we make mistakes.
I am working to bring this understanding to my students. I don't want them to fear failure: whether it's the wrong answer on a math problem or misspelling a word. With mistakes, our brains will grow and we will learn. So let's put in the effort and "fail forward," until we are successful!