Still, however, it may be maintained that "all force is will-force." But "if there be any truth in the doctrine of Conservation of Force, ... this doctrine does not change from true to false when it reaches the field of voluntary agency. The will does not, any more than other agencies, create Force: granting that it originates motion, it has no means of doing so but by converting into that particular manifestation, a portion of Force which already existed in other forms. It is known that the source from which this portion of Force is derived, is chiefly, or entirely, the force evolved in the processes of chemical composition and decomposition which constitute the body of nutrition: the force so liberated becomes a fund upon which every muscular and every nervous action, as of a train of thought, is a draft. It is in this sense only that, according to the best lights of science, volition is an originating cause. Volition, therefore, does not answer to the idea of a First Cause; since Force must, in every instance, be assumed as prior to it; and there is not the slightest colour, derived from experience, for supposing Force itself to have been created by a volition. As far as anything can be concluded from human experience, Force has all the attributes of a thing eternal and uncreated.... "All that can be affirmed (even) by the strongest assertion of the Freedom of the Will, is that volitions are themselves uncaused and are, therefore, alone fit to be the first or universal cause. But, even assuming volitions to be uncaused, the properties of matter, so far as experience discloses, are uncaused also, and have the advantage over any particular volition, in being, so far as experience can show, eternal. Theism, therefore, in so far as it rests on the necessity of a First Cause, has no support from experience." Such may be taken as a sufficient refutation of the argument that, as human volition is apparently a cause in nature, and moreover constitutes the basis of our conception of all causation, therefore all causation is probably volitional in character. But as this is a favourite argument with some theists, I shall introduce another quotation from Mr. Mill, which is taken from a different work.