I found this video from Sentis describing conscious vs. subconscious thinking. One of its key points is that conscious thinking takes way more time and energy than subconscious thinking. Much fewer resources are used when we don’t have to think about our actions, make decisions, or solve problems.
This brain laziness serves the same function as our cravings for fat and sugar and our aversion to physical exercise. Our bodies (including our brains) are trained by evolution to use as little energy as possible, because that allows us to survive during lean times.
The problem is, living on autopilot is just about as healthy for us as eating junk food while sitting in front of the TV all day. We need to exercise our brains if we don’t want the mental equivalent of a beer gut.
This means challenging ourselves to be creative, flexible, and always keep learning. It also suggests that we actively keep our minds open to new ways of thinking and even listen for truth from those with whom we tend to disagree.