These precepts have been taken from Coue's book Self Mastery:
When the will and the imagination are antagonistic, it is always the imagination which wins, without any exception.
In the conflict between the will and the imagination, the force of the imagination is in direct ratio to the square of the will.
When the will and the imagination are in agreement, one does not add to the other, but one is multiplied by the other.
Every thought entirely filling our mind becomes true for us and tends to transform itself into action.
To become master of oneself it is enough to think that one is becoming so.
When you make conscious autosuggestions, do it naturally, simply, with conviction, and above all without any effort.
Do not spend your time in thinking of illness you might have, for if you have no real ones you will create artificial ones.
It is then the imagination and not the will which is the most important faculty of man; and thus it is a serious mistake to advise people to train their wills, it is the training of their imaginations which they ought to set about.
By believing oneself to be the master of one's thoughts one becomes so.
Every one of our thoughts, good or bad, becomes concrete, materializes, and becomes in short a reality. We are what we make ourselves and not what circumstances make us.
Autosuggestion is an instrument which you have to learn how to use just as you would for any other instrument. An excellent gun in inexperienced hands only gives wretched results, but the more skilled the same hands become, the more easily they place the bullets in the target.
People are always preaching the doctrine of effort, but this idea must be repudiated. Effort means will, and will means the possible entrance of the imagination in opposition, and the bringing about of the exactly contrary result to the desired one.
Conscious autosuggestion, made with confidence, with faith, with perseverance, realizes itself mathematically, within reason.
Contrary to common opinion, physical diseases are generally far more easily cured than mental ones.