Enthusiasm is intense enjoyment, interest, or approval.
The word "enthusiastic" was originally used to refer to a person possessed by a god. It comes from the Greek word ἐνθουσιασμός from ἐν and θεός and ουσία, meaning "possessed by [a] god's essence", applied by the Greeks to manifestations of divine possession, by Apollo (as in the case of the Pythia), or by Dionysus (as in the case of the Bacchantes and Maenads), the term enthusiasm was also used in a transferred or figurative sense. Socrates taught that the inspiration of poets is a form of enthusiasm. The term was confined to a belief in religious inspiration, or to intense religious fervour or emotion.
From this, a Syrian sect of the 4th century was known as the Enthusiasts. They believed that "by perpetual prayer, ascetic practices and contemplation, man could become inspired by the Holy Spirit, in spite of the ruling evil spirit, which the fall had given to him". From their belief in the efficacy of prayer, they were also known as Euchites.
The Enneagram of Personality, or simply the Enneagram (from the Greek words ἐννέα [ennea, meaning "nine"] and γράμμα [gramma, meaning something "written" or "drawn"]), is a model of human personality which is principally understood and taught as a typology of nine interconnected personality types. Although the origins and history of many of the ideas and theories associated with the Enneagram of Personality are a matter of dispute, contemporary Enneagram understandings are principally derived from the teachings of Oscar Ichazo and Claudio Naranjo. Naranjo's theories were partly influenced by some earlier teachings of G. I. Gurdjieff. As a typology the Enneagram defines nine personality types (sometimes referred to as "enneatypes"), which are represented by the points of a geometric figure called an enneagram, which, it is believed, also indicate some of the connections between the types. There are different schools of thought among Enneagram teachers, therefore their ideas on some theoretical aspects are not always in agreement.