They are comfortable with what they already learned over the years. They don t want to stretch their minds any further. They like things to stay just the way they are. That s the way it is now. But, just like animals, if people stay on the same paths in life they will eventually wear themselves into ruts.
Some people protect themselves by using mental blinders and ear plugs.
They have set routines in their everyday lives. By doing everything automatically, they miss out on so many experiences. Amazing things are going on all around them, but they aren t aware of it. They miss out on many of the treasures and pleasures of life, because they are in a rut. They seem to live a mindless, unaware existence.