Assagioli's conception has an affinity with existential-humanistic psychology and other approaches which attempt to understand the nature of the healthy personality, personal responsibility and choice, and the actualization of the personal self; similarly, his conception is related to the field of transpersonal psychology, with its focus on higher states of consciousness, spirituality, and human experiencing beyond the individual self.
Accordingly, Assagioli served on the board of editors for both the Journal of Humanistic Psychology and the Journal of Transpersonal Psychology.
At the same time, 'the lower unconscious merely represents the most primitive part of ourselves... It is the capacity to form patterns of skills, behaviors, feelings, attitudes, and abilities that can function without conscious attention, thereby forming the infrastructure of one's conscious life.
The function of the middle unconscious can be seen in all spheres of human development, from learning to walk and talk, to acquiring languages, to mastering a trade or profession, to developing social roles.
It comprises that range of experience related to the threat of personal annihilation, of destruction of self, of nonbeing, and more generally, of the painful side of the human condition.
As long as this range of experience remains unconscious, the person will have a limited ability to be empathic with self or others in the more painful aspects of human life. The middle unconscious is a sector of the person whose contents, although unconscious, nevertheless support normal conscious functioning in an ongoing way (thus it is illustrated as most immediate to "I").Psychosynthesis departed from the empirical foundations of psychology in that it studied a person as a personality and a soul but Assagioli continued to insist that it was scientific. Jung had written, comparing his goals to those of Sigmund Freud, "If there is a 'psychoanalysis' there must also be a 'psychosynthesis which creates future events according to the same laws'." A. Orage, who was the publisher of the influential The New Age journal, also made use of the term, which he hyphenated as psycho-synthesis.He developed therapeutic methods beyond those found in psychoanalysis. Orage, who were both far closer to Assagioli's thinking than Putnam. Orage formed an early psychology study group (which included Maurice Nicoll who later studied with Carl Jung) and concluded that what humanity needed was not psychoanalysis, but psycho-synthesis."I" is the direct "reflection" or "projection" of Self (Assagioli) and the essential being of the person, distinct but not separate from all contents of experience."I" possesses the two functions of consciousness, or awareness, and will, whose field of operation is represented by the concentric circle around "I" in the oval diagram – Personal Will.'One of the first people to have started really making use of subpersonalities for therapy and personal growth was Roberto Assagioli', psychosynthesis reckoning that 'subpersonalities exist at various levels of organization, complexity, and refinement' throughout the mind.A five-fold process of recognition, acceptance, co-ordination, integration, and synthesis 'leads to the discovery of the Transpersonal Self, and the realization that that is the final truth of the person, not the subpersonalities'.This level of the unconscious represents an area of the personality that contains the "heights" overarching the "depths" of the lower unconscious.As long as this range of experience remains unconscious – in what Desoille termed '"repression of the sublime"' – the person will have a limited ability to be empathic with self or other in the more sublime aspects of human life.As with the lower unconscious, this area is by definition not available to consciousness, so its existence is inferred from moments in which contents from that level affect consciousness.Contact with the higher unconscious can be seen in those moments, termed peak experiences by Maslow, which are often difficult to put into words, experiences in which one senses deeper meaning in life, a profound serenity and peace, a universality within the particulars of existence, or perhaps a unity between oneself and the cosmos.