Knowing how to combat your own confirmation bias helps remove that huge handicap that we all share—the tendency for our beliefs to drift toward what … - Greg Craven

As much as we think science is about being right, the actual practice of the stuff is largely focused on being wrong.
Why? Because being open to the possibility that you might be wrong is exactly how you get less wrong over time, sort of like saying “I’d better find all the holes in my argument before someone else can." Strangely, the way to make your ideas stronger is to try to break them. Looking for errors in your understanding rather than just trying to find supporting evidence is the best way to improve your ideas.

As humans, we reflexively reject arguments that contradict what we would like to be true.

The clever part is that it changes the question from, Who should I believe? to, What should I do? After all, the physical world is unaffected by our beliefs. It reacts only to our actions.