Transpersonal psychology is concerned with understanding the nature of consciousness, the relationship between mind and body, and the potential for human transformation and growth.

The self is a central concept in transpersonal psychology, referring to the essential, unified, and unchanging aspect of an individual's being.

Mystical experiences are characterized by a sense of unity, interconnectedness, and transcendence of the ego.

Abraham Maslow introduced the concept of 'peak experiences' to describe moments of intense joy, fulfillment, and self-actualization.

Individuation is a process of psychological and spiritual development that involves the integration of the conscious and unconscious aspects of the self.

Ken Wilber is a prominent transpersonal psychologist who has developed a comprehensive theory of human development that includes the 'transpersonal self' and the 'great chain of being'.

Panpsychism is the belief that consciousness is a fundamental property of all matter and energy.

Stanislav Grof is a Czech-American psychiatrist and transpersonal psychologist known for his work on 'holotropic breathwork' and 'transpersonal psychotherapy'.

Dualism is the belief that the mind and body are separate entities.

Roberto Assagioli was an Italian psychiatrist and transpersonal psychologist known for his work on 'psychosynthesis' and the 'transpersonal unconscious'.

Materialism is the belief that consciousness is an emergent property of the brain.

Anthony Sutich is an American transpersonal psychologist known for his work on 'spiritual emergency' and 'transpersonal counseling'.

Holism is the belief that the mind and body are interconnected and influence each other.

John Welwood is an American transpersonal psychologist known for his work on 'the transpersonal perspective' and 'the psychology of awakening'.

Panentheism is the belief that the universe is a conscious being.