The science behind this sits within the field of neuroplasticity - the brain's ability to rewire itself in response to new inputs and habits.
Self talk works on the same principle. Research suggests that around 77% of the average person's internal dialogue is negative - and 80% of it is a repeat of the day before. That cycle keeps you locked in survival mode, feeding racing thoughts, overthinking, poor sleep, and physical symptoms including elevated heart rate, digestive issues, and reduced immunity.
Auto-suggestion - a method developed by French psychologist Emile Coue between 1857 and 1926 - is one of the most effective tools for breaking that cycle. Endorsed by modern neuroscience experts including Dr Tara Swartz, Dr Bruce Lipton, and Dr Joe Dispenza, positive self talk is not wishful thinking. It is a trainable skill with real, lasting impact.