I am making a hell lot of mistakes in exams - some due to lack of understanding of concepts, others due to lack of study and practice. But should it make me frustrated and unhappy as it's making one of my friends who is in the same condition as me? No I would say. No compromise with happiness. To quote John Galt of Any Rand's 'Atlas Shrugged' – 'Life is the reward of virtue – and happiness is the goal and the reward of life.' Mistakes are nothing but learning experiences. It's worth (and needed) to ponder over the reasons and ways of making rectifications but not at the cost of one's happiness. I will say I am happy that I made the mistake. Yes, I mean it. Because I now know what is right. Every time I made a mistake I introspect (rather, I try to) – whether I should moan over it or learn and let it go. When I understand the futility of being frustrated, I become comfortable accepting my mistake. I reevaluate my goal, values and purpose. I recognize the reality and I move on never letting myself be unhappy.