There is a large, influential, and daily increasing class of scientists, among whom may be named Faraday, Prof. Owen, Dr. Laycock, Wallace, Dr. Winslow, Prof. Huxley, who do not regard matter as an ultimate entity, and who believe that all the phenomena of matter (so called), even extension, resistance, and ultimate incompressibility, may be resolved into phenomena of force. In other words, matter is only _phenomenal_, and, like all phenomena, demands a _cause_.[171] These men are perplexed with no difficulties as to the _origin_ of matter. As a phenomenon it must be a product of Creative Efficiency, and therefore had a beginning. It is obviously unnecessary that we should here discuss the merits of this hypothesis which resolves matter into force. We shall encounter it at a subsequent stage of our inquiry, and may then attempt to gauge its merits. It is enough for our present purpose that Heat, Light, Color, Sound, Electricity, Magnetism, are recognized as forms of molecular Energy--phenomena of Force; that these forms of invisible molecular energy, together with all the energy of visible motions and positions, are regarded as flowing from one great central force, or fountain-head of power; and that there is a remarkable unanimity among the first scientific men of our age in acknowledging this power as the Creative Efficiency of God. These forces uniformly work in obedience to Law; and Law, whether viewed in the orderly movement of a planet or an atom, in the symmetrical arrangement of a crystal of the definite proportions of chemical combination, in the organization of a worm or of an elephant, is intellect, is _reason_. This is the ultimate principle upon which every condition of matter and form depends.