Medhananda, born Fritz Winkelstroeter in Pforzheim, Germany, in 1908, wrote his manuscripts in English (although his mother tongue was German), because he lived from 1952 until his passing in 1994 in South India,
first in the Sri Aurobindo Ashram in Pondicherry, later in the Identity Research Institute, a non-profit foundation for psychological
research which he and his collaborator Yvonne Artaud have founded in 1978. They started an in-depth exploration of the symbology of
the hieroglyphs and pictorial imagery of ancient Egypt, using the psychological approach that Sri Aurobindo had initiated for the
interpretation of the Indian Vedas (the ancient spiritual texts of India).
Yvonne Artaud, born in Lyon, France, in 1924 joined the Sri Aurobindo Ashram also in 1952 and
wrote her works (about the psychology of self-awareness in pre-school children and South Indian primates) in English or French. Author of numerous studies on childhood education,
she is the creator of several innovative teaching-learning materials.