Your brain can only perceive what it’s known, so when you choose what you want for the future, you’re actually just recreating a solution or an ideal of the past. When things don’t work out the way you want them to, you think you’ve failed only because you didn’t re-create something you perceived as desirable. In reality, you likely created something better, but foreign, and your brain misinterpreted it as “bad” because of that.
