In philosophy, physiology, and psychology, a disposition is a habit, a preparation, a state of readiness, or a tendency to act in a specified way. To meet Wikipedias quality standards, this article or section may require cleanup. ... Physiology (in Greek physis = nature and logos = word) is the study of the mechanical, physical, and biochemical functions of living organisms. ... Auguste Rodins The Thinker, bronze cast by Alexis Rudier, Laeken Cemetery, Brussels, Belgium. ... A habit is the usual condition or state of a person or thing, either natural or acquired, regarded as something had, possessed, and firmly retained. ...