This book was written by a medical doctor in 1923, a time when with almost no access to massive communication, people could concentrate better on their selves. There is not a magical formula to get mental supremacy, however with a series of very simple exercises mental efficiency can be improved. The methods presented in this book require no previous training nor specialized knowledge and even children can easily apply them.
Secrets of Mental Supremacy eBook by W.R.C. Latson M.D.
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