What is one thing you used to believe that you no longer believe? This question gets at the heart of a big issue, do we change our beliefs? Are we willing to admit that we were wrong and update our beliefs in light of new knowledge and experience? Most of us probably claim we are willing to revise our beliefs, but in my experience, this actually happens pretty infrequently. We become entrenched and attached to our beliefs. They give us stability and security. Changing them requires vulnerability and honesty that can hurt a bit.