The unconscious mind (or the unconscious) consists of the processes in the mind which occur automatically and are not available to introspection, and include thought processes, memories, interests, and motivations.
Empirical evidence suggests that unconscious phenomena include repressed feelings, automatic skills, subliminal perceptions, thoughts, habits, and automatic reactions, and possibly also complexes, hidden phobias and desires.
Thus the unconscious mind can be seen as the source of dreams and automatic thoughts (those that appear without any apparent cause), the repository of forgotten memories (that may still be accessible to consciousness at some later time), and the locus of implicit knowledge (the things that we have learned so well that we do them without thinking).
The term "unconscious" (German: Unbewusste) was coined by the 18th-century German Romantic philosopher Friedrich Schelling (in his ch. 6, § 3) and later introduced into English by the poet and essayist Samuel Taylor Coleridge (in his Biographia Literaria). Some rare earlier instances of the term "unconsciousness" (Unbewußtseyn) can be found in the work of the 18th-century German physician and philosopher Ernst Platner.
Influences on thinking that originate from outside of an individual's consciousness were reflected in the ancient ideas of temptation, divine inspiration, and the predominant role of the gods in affecting motives and actions. The idea of internalised unconscious processes in the mind was also instigated in antiquity and has been explored across a wide variety of cultures. Unconscious aspects of mentality were referred to between 2500 and 600 BC in the Hindu texts known as the Vedas, found today in Ayurvedic medicine.
In 1880, Edmond Colsenet supports at the Sorbonne, a philosophy thesis on the unconscious. Elie Rabier and Alfred Fouillee perform syntheses of the unconscious "at a time when Freud was not interested in the concept".