Words and voice tone influence thoughts, emotions and behavior. Cognitive behavior therapy, for example, helps patients feel better and act in healthier ways by getting them to restate their irrational remarks as healthier statements (an over simplification and just part of the first step). Here is an example of how an irrational thought process can impact emotion and behavior and how cognitive behavior therapy might reframe it in a healthier form.
See Also: Therapeutic Communication
Direct link: Words To Re-frame Irrational and Self-Destructive Thinking