No model of how the mind works disputes the tremendous power which is in constant action below the tip of the iceberg. The conscious mind is constantly supported by unconscious resources. Just think of all the things you know how to do without conscious awareness. If you drive, you use over 30 specific skills... without being aware of them. These are skills, not facts; they are processes, requiring intelligence, decision-making and training.
Besides these learned resources which operate below the surface of consciousness there are important natural resources. For instance, the unconscious mind regulates all the systems of the body and keeps them in harmony with each other.
The conscious mind, like the part of the iceberg above the surface, is a small portion of the whole being. The conscious mind is what we ordinarily think of when we say 'my mind.' It's associated with thinking, analyzing and making judgments and decisions.The conscious mind is actively sorting and filtering its perceptions, everything else falls back below the water line, into unconsciousness.
Only seven bits of information, plus or minus two can be held consciously at one time. Everything else we are thinking, feeling or perceiving now... along with all our memories remains unconscious, until called into consciousness or until rising spontaneously.