Some failure in life is inevitable. It is impossible to live without failing at something, unless you live so cautiously, that you might as well not have lived at all. In which case you have failed by default. Failure gave me an inner security that I had never obtained by passing examinations. Failure taught me things that I could not have learned any other way. I discovered I had a strong will and more discipline than I had suspected.
J. K. RowlingWhen Filch wasn't guarding the scene of the crime, he was skulking red-eyed through the corridors, lunging out at unsuspecting students and trying to put them in detention for things like "breathing loudly" and "looking happy.
J. K. Rowling