A life principle is a set of values or beliefs that guide an individual's behavior. The three crossword solutions for the term LIFE PRINCIPLE are ATMAN (5 letters), ANIMA (5 letters), and SPIRIT (6 letters). ATMAN is a Hindu philosophical concept referring to the true self of an individual beyond identification with the phenomenal reality of everyday life. ANIMA is a Jungian concept referring to the unconscious feminine side of a man's personality. SPIRIT is a broad concept that can refer to a supernatural being, a vital principle, or the animating force within living beings.