Émile Coué bol psychológ a farmaceut, známy svojou terapeutickou metódou autosugescie a obzvlášť frázou „Každý deň, vo všetkom, sa mám lepšie a lepšie“. Jeho prístup sa často označoval ako Couéizmus alebo Couého metóda. Zameriaval sa na silu mysle a jej vplyv na fyzické a duševné zdravie. Jeho dielo zdôrazňuje potenciál sebavedomého presvedčenia na dosiahnutie zlepšenia v každodennom živote.
Coué believed that it was possible to reprogram one's psyche through the repetition of key mantras or affirmations, resulting in dramatic improvements in health, self-image, and a general feeling of wellbeing. He became best known for counseling people in the use of one basic affirmation: Day by day, in every way, I am getting better and better.
Autosuggestion is presented as a technique developed by Emile Coué that aims to enhance mental and physical well-being by influencing the subconscious mind through repeated affirmations. Contrary to the belief that willpower alone leads to success, Coué emphasized the importance of imagination in effecting change. His method, which involves a structured routine of affirmations, is intended to complement medical practices rather than replace them. The book also touches on the influence of Coué's work on later techniques like autogenic training, developed by Johannes Schultz.