
SomeĬonsidered the soul to be a single simple principle others distinguished between the soul, the principle of bodily life, and the intellectual powers by which man thinks (see faculties of the soul). Often it was compared or identified with air, wind, breath, or spirit.

The nature of this principle was not always clearly understood. All cultures and civilizations have been convinced that man is not a purely material being rather, they recognize that man possesses within himself some element that is relatively independent of the body, giving life and power to the body. The human soul, essentially different from other souls, is that internal principle by which man lives, perceives, and thinks ( Anim.

The intrinsic force, or principle of movement, by which certain things are living is commonly called the soul (see Aristotle, Anim. Intuitively and almost universally man acknowledges an essential difference between living and nonliving things.
