Antaḥkaraṇa (Sanskrit: अन्तःकरण, meaning the inner organ or inner instrument) is a concept in Hindu philosophy, referring to the totality of two levels of mind, namely the buddhi (the intellect or higher mind) and the manas (the middle levels of mind) which, according to theosophy, exist as or include the mental body

Antaḥkaraṇa has also been called the link between the middle and higher mind, the reincarnating part of the mind

In Vedāntic literature, this antaḥkaraṇa (internal organ) is organised into four parts: Ahaṃkāra (ego) – identifies the Atman (self) with the body as ‘I’ Buddhi (intellect) – controls decision making Manas (mind) – controls sankalpa (will or resolution) Citta (memory) – deals with remembering and forgettingAnother description says that “antaḥkaraṇa” refers to the entire psychological process, including mind and emotions, are composing the mind levels, as described above, which are mentioned as a unit that functions with all parts working together as a whole

Furthermore, when considering that mind levels are bodies, they are: manomayakośa - related to manas - the part of mind related to five senses, and also craving for new and pleasant sensations and emotions, while buddhi (intellect, intelligence, capacity to reason), is related to vijñānamayakośa - the body of consciousness, knowledge, intuition and experience

Antahkarana also refers to a symbol used in the Reiki healing method