... it is necessary to point out that I am not just being critical of the convictions of other sincere and dedicated individuals engaged in the field of mental hygiene. It is always good to re-evaluate our present thinking on any subject, no matter how sincere or convinced we may be that what we are doing is correct. At times, we can become so immersed in our convictions that we cannot take criticism and respond ... — A Practical Guide to Self-Hypnosis • Melvin Powers
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