How DO we measure whether one fails or succeeds?
Imagine a person failing 6 times out of 10 attempts and being considered a huge success. Read the inspiring NYTimes article "Ted Williams's .406 Average Is More Than a Number."
BTW, failing 7 times out of 10 attempts can be pretty good, too. I guess failure or success is often in the eyes of the beholder, so parents be kind when your kids fail.