MENTAL PRACTICE: MOVING THE ATTENTION

A practical approach to mental concentration training. The author is offering another bouquet of lessons about concentration techniques. 
This book is addressed to the contemporary seekers, but maintaining the classical principles validated by experience.

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https://www.amazon.com/Mental-Practice-Moving-Attention-Halmyris-ebook/dp/B019VJFX48/ref=la_B00K3OYR5M