Occasionalism, the doctrine that the action of the spiritual organisation on the material, and of the material on the spiritual, or of the inner on the outer, and the outer on the inner, is due to the divine interposition taking occasion of the effort of mind, or of the inner, on the one hand, and the effort of matter, or the outer, on the other, to work the effect or result; or that the link connecting cause and effect in both cases, that is, the acion of the outer world on the inner, and vice versa, is God.