“Deep thinking and learning is also taxing on our energy stores, and so we require simplification and reinforcement. Our minds, through repetition or emotion, learn things and then, having committed them to memory, rely on this information and often never question it again; we put our energy into other things we deem more important. Like building a structure with a strong base, we make our mental models the foundation for adding newer information. We notice things that match our view and we dismiss things that do not. As we build our narrow knowledge on top of that foundation, we might not even realize when the foundation itself is weak. And so, as we go on with our lives, filtering a massive amount of information, we can easily become blind to important information, caught in our own bubbles, disregarding some information or alternative views, even when it might be helpful to us. Our decisions are shaped by what we regard as the facts, and if new information emerges that belies what we believe, it often hardens us to our original view.”