The average human being has over 12,000 different thoughts each day.
The human mind can be split into two different parts, the conscious and the subconscious.
The Conscious Mind
The conscious mind only represents a mere 12% of the total mind's capacity and can only be concerned with, or hold one single thought at a time. It responsible for the voluntary actions of our muscles.
The conscious mind is mainly active when we are awake and is responsible for our decision making processes or rationalisation and analysis. It decides what action we will take often based upon past subconscious experiences.
The conscious mind has no memory capacity, and therefore only deals with the 'here and now' situation.
The Subconscious Mind
The subconscious mind takes up the remaining 88% of our brain's capacity, and could be compared to a massive computer system that stores all of the information regarding our location, situation, feelings etc.
It controls our Autonomic Nervous System such as our heart beat, breathing, organs and glands - in other words all of the things we do not have to think about.
The subconscious mind has no reasoning power, and cannot reject anything that it is told.
The subconscious mind has a perfect memory. In fact if you were to merely glance at the face of a passer by in a crowd, your subconscious mind would be able to recall every detail regarding that person such as his clothes, facial lines or wrinkles, everything that you saw. You may have to do some searching to find this information, but be assured that it would be there, even years later.
As mentioned earlier, the conscious mind constantly refers to it's counterpart for information. When a person is writing a word on a piece of paper, the subconscious mind will attempt to locate the correct spelling and then pass that information to the conscious mind so that it can instruct the muscles in the hand to act accordingly.
If a child constantly misspells a certain word, it is likely that, as the child grows older, the incorrect spelling will always be used. This is because the subconscious mind has recorded the incorrectly spelt word and has no way of knowing that it has been misinformed.
In effect, the subconscious mind is like a computer program that runs our body for us. It never sleeps and will continue to runs it's program, such as digesting food, maintaining the body, healing cuts and bruises etc.
Whilst in a trance state, the subconscious mind will accept any suggestion it receives without question. It must be remembered however that is a suggestion is not conducive with the moral code of the subconscious, or if it is perceived as a threat, then there is a likelihood that the conscious mind will reawaken to analyse the situation accordingly.
When we go into a trance, whether induced as part of hypnosis, or as a natural process, our conscious mind is not really needed and becomes dormant. It operates in a similar way to an auto-pilot on an aircraft - should anything happen that requires the conscious mind to reawaken, it will do so immediately.