Your brain is wired to be right. Yep. Hardwired. Once you make a decision about what you choose to believe (Money is the root of all evil, I’ll never be able to afford to retire, all single people over age 40 are goods, the world is going to hell in a handbasket) your brain programs itself to find proof that you’re right. Which means that it literally filters through all of the information that is forever coming at you in a given day, ignoring any information that might contradict your belief and noticing only the information that supports your belief, thus reinforcing the idea that you are, in fact, right.