It has been said that Karma is the continuance of the act, and for any particular line of Karma to exert itself it is necessary that there should be the basis of the act engendering that Karma in which it can inhere and operate. But action has many planes in which it can inhere. There is the physical plane, the body with its senses and organs; then there is the intellectual plane, memory, which binds the impressions of the senses into a consecutive whole and reason puts in orderly arrangement its storehouse of facts. Beyond the plane of intellect there is the plane of emotion, the plane of preference for one object rather than another:—the fourth principle of the man. These three, physical, intellectual, and emotional, deal entirely with objects of sense perception and may be called the great battlefield of Karma.[117] There is also the plane of ethics, the plane of discrimination of the “I ought to do this, I ought not to do that.” This plane harmonizes the intellect and the emotions. All these are the planes of Karma or action what to do, and what not to do. It is the mind as the basis of desire that initiates action on the various planes, and it is only through the mind that the effects of rest and action can be received. An entity enters incarnation with Karmic energy from past existences, that is to say the action of past lives is awaiting its development as effect. This Karmic energy presses into manifestation in harmony with the basic nature of the act. Physical Karma will manifest in the physical tendencies bringing enjoyment and suffering. The intellectual and the ethical planes are also in the same manner the result of the past Karmic tendencies and the man as he is, with his moral and intellectual faculties, is in unbroken continuity with the past.