The mind is the most powerful force in the universe and you should not underestimate the power of your own subconscious mind. Remember that no matter what a person says or does all action originates in the mind. In some instances, the actions of the mind are manifested on a conscious level.
Have you ever done anything throughout your day on complete auto-pilot? Simple tasks that you just get done without thinking about why you’re doing them are those controlled by your subconscious need to do them.