The following excerpts are from The Game of Life and How to Play It by Florence Scovel Shinn.  Any emphasis is original.

1.  The Subconscious Mind 

The subconscious mind is power without direction.  It is like a stream or electricity, and it does what it is directed to do; it has no power of induction.   Whatever man feels deeply or images clearly, is impressed upon the subconscious mind, and carried out in minutest detail. (p. 8) 

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The subconscious mind has no sense of humor and people often joke themselves into unhappy experiences.  Fortunately the law works both ways, and a situation of lack may be changed to one of plenty.  

Jesus Christ multiplied the loaves and fishes, for he taught that every man had the power to bless and to multiply, to heal and to prosper. (p. 11) 

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The subconscious mind … is man’s faithful servant but one must be careful to give it the right orders.  Man has ever a silent listener at his side—his subconscious mind.  

Every thought, every word is impressed upon it and carried out in amazing detail.  It is like a singer making a record … [e]very note and tone of the singer’s voice is registered.  If he coughs or hesitates, it is registered also.  So let us break all the old bad records in the subconscious mind, the records of our lives which we do not wish to keep, and make new and beautiful ones. (p. 14) 

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[M]ake a change in the subconscious … by asserting, “There are not two powers, there is only one power, God, therefore, there are no disappointments, and this thing means a happy surprise.” (p. 24) 

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The soul is the subconscious mind, and it must be “saved” from wrong thinking. 

In the twenty-third psalm, we read: “He restoreth my soul.”  This means the subconscious mind or soul must be restored with right ideas, and the “mystical marriage” is the marriage of the soul and the spirit, or the subconscious and superconscious mind.  They must be one.  When the subconscious is flooded with the perfect ideas of the superconscious, God and man are one.  “I and the Father are one.”  That is, he is one with the realm of perfect ideas; he is the man made in God’s likeness and image (imagination) and is given power and dominion over all created things, his mind, body and affairs. (p. 26) 

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If you do not run your subconscious mind yourself, someone else will run it for you. (p. 31) 

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In order to impress the subconscious, active faith is always essential. 

“Faith without works is dead.” (p. 51) 

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The subconscious is often impressed through music.  Music has a fourth dimensional quality and releases the soul from imprisonment.  It makes wonderful things seem possible, and easy of accomplishment!… 

It puts [some people] in perfect harmony and releases the imagination…. 

[Some people dance] while making [their] affirmations.  The rhythm and harmony of music and motion carry [their] words forth with tremendous power. (p. 52) 

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Continually “making-believe,” impresses the subconscious.  If one makes believe he is rich, and makes believe he is successful, in “due time he will reap.” 

Children are always “making believe,” and except ye be converted, and become as little children, ye shall not enter the Kingdom of Heaven.”  (p. 53)

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People little dream of how their affairs react on the body.  There is a mental correspondence for every disease.  A person might receive instantaneous healing through the realization of his body being a perfect idea in Divine Mind, and, therefore, whole and perfect, but if he continues his destructive thinking, hoarding, hating, fearing, condemning, the disease will return. 

Jesus Christ knew that all sickness came from sin, but admonished the leper after the healing, to go and sin no more, lest a worse thing come upon him.

 So man’s soul (or subconscious mind) must be washed whiter than snow, for permanent healing … (p. 69-70) 

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2.  The Conscious Mind 

The conscious mind has been called mortal or carnal mind.  It is the human mind and sees life as it appears to be.  It sees death, disaster, sickness, poverty and limitation of every kind, and it impresses the subconscious. (p. 9)

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3.  The Superconscious Mind 

The superconscious mind is the God Mind within each man, and is the realm of perfect ideas.  In it is the “perfect pattern” spoken by Plato, The Divine Design, for there is a Divine Design for each person.    

“There is a place that you are to fill and no one else can fill, something you are to do, which no one else can do.”  There is a perfect picture of this in the superconscious mind.  It usually flashes across the conscious as an unattainable ideal—“something too good to be true.”  In reality it is man’s true destiny (or destination) flashed to him from the Infinite Intelligence which is within himself. 

Many people, however, are in ignorance of their true destinies and are striving for things and situations which do not belong to them, and would only bring failure and dissatisfaction if attained. (p. 9)