The principle of individuation, or principium individuationis, describes the manner in which a thing is identified as distinct from other things.
The concept appears in numerous fields and is encountered in works of Leibniz, Carl Jung, Gunther Anders, Gilbert Simondon, Bernard Stiegler, Friedrich Nietzsche, Arthur Schopenhauer, David Bohm, Henri Bergson, Gilles Deleuze, and Manuel DeLanda.
Identity formation, also called identity development or identity construction, is a complex process in which humans develop a clear and unique view of themselves and of their identity.
Self-concept, personality development, and values are all closely related to identity formation. Individuation is also a critical part of identity formation. Continuity and inner unity are healthy identity formation, while a disruption in either could be viewed and labeled as abnormal development; certain situations, like childhood trauma, can contribute to abnormal development. Specific factors also play a role in identity formation, such as race, ethnicity, and spirituality.
In alchemy, the Magnum Opus or Great Work is a term for the process of working with the prima materia to create the philosopher's stone. It has been used to describe personal and spiritual transmutation in the Hermetic tradition, attached to laboratory processes and chemical color changes, used as a model for the individuation process, and as a device in art and literature. The magnum opus has been carried forward in New Age and neo-Hermetic movements which sometimes attached new symbolism and significance to the processes. The original process philosophy has four stages:
The origin of these four phases can be traced at least as far back as the first century. Zosimus of Panopolis wrote that it was known to Mary the Jewess. The development of black, white, yellow, and red can also be found in the Physika kai Mystika of Pseudo-Democritus, which is often considered to be one of the oldest books on alchemy. After the 15th century, many writers tended to compress citrinitas into rubedo and consider only three stages. Other color stages are sometimes mentioned, most notably the cauda pavonis (peacock's tail) in which an array of colors appear.