How do you approach those moments when your experiment does not go as expected?

Almost every project I’ve been involved in has not turned out how we first envisioned it, and things that were problems have actually been signs of something interesting. Initially, you're frustrated and you want the problem to go away, but as it persists, you accept it and pursue the mysterious, and sometimes good things happen. Of course, when people talk about how a mistake or a confusion led to great results, this is true, but it may also be overly romanticized. After you get the great result, you feel exhilarated, but in the beginning, you're so frustrated that you consider quitting. These situations always look better in hindsight.