Émile Coué 
Self Mastery Through Conscious Autosuggestion 

‚We possess within us a force of incalculable power, which, when we handle it unconsciously is often prejudicial to us. If on the contrary we direct it in a conscious and wise manner, it gives us the mastery of ourselves and allows us not only to escape and to aid others to escape, from physical and mental ills, but also to live in relative happiness, whatever the conditions in which we may find ourselves.‘ E. Coué