Here’s an interesting quote by William Walker Atkinson:

“There are more people on the negative plane of thought than on the positive plane, and consequently there are more negative thought vibrations in operation in our mental atmosphere. But, happily for us, this is counterbalanced by the fact that a positive thought is infinitely more powerful than a negative one, and if by force of will we raise ourselves to a higher mental key we can shut out the depressing thoughts and may take up the vibrations corresponding with our changed mental attitude.

This is one of the secrets of the affirmations and autosuggestions used by the several schools of Mental Science. There is no particular merit in affirmations of themselves, but they serve a twofold purpose:

(1) They tend to establish new mental attitudes within us and act wonderfully in the direction of character- building – the science of making ourselves over.
(2) They tend to raise the mental keynote so that we may get the benefit of the positive thought waves of others on the same plane of thought.

Whether or not we believe in them, we are constantly making affirmations. The man who asserts that he can and will do a thing – and asserts it earnestly – develops in himself the qualities conducive to the well doing of that thing, and at the same time places his mind in the proper key to receive all the thought waves likely to help him in the doing. If, on the other hand, one says and feels that he is going to fail, he will choke and smother the thoughts coming from his own subconscious mentality which are intended to help him, and at the same time will place himself in tune with the Failure-thought of the world – and there is plenty of the latter kind of thought around, I can tell you.

Do not allow yourselves to be affected by the adverse and negative thoughts of those around you. Rise to the upper chambers of your mental dwelling, and key yourself up to a strong pitch, away above the vibrations on the lower planes of thought. Then you will not only be immune to their negative vibrations but will be in touch with the great body of strong positive thought coming from those of your own plane of development.

My aim will be to direct and train you in the proper use of thought and will, that you may have yourself well in hand and may be able to strike the positive key at any moment you may feel it necessary. It is not necessary to strike the extreme note on all occasions. The better plan is to keep yourself in a comfortable key, without much strain, and to have the means at command whereby you can raise the pitch at once when occasion demands. By this knowledge you will not be at the mercy of the old automatic action of the mind, but may have it well under your own control.”

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