Complete Text. Self Mastery Through Conscious Autosuggestion (full original title). Emile Coué, a French psychologist and pharmacist, introduced a new method of healing and self-improvement using the power of auto-suggestion. Self Mastery details his method and explains how the whole concept of optimistic auto-suggestion works and how to use it for your own betterment. Discover how his methods can help you, just as they have helped millions of others.