We come, then, to these propositions:--1st, That human power is utterly unable to break any law of matter except the law of inertia. 2nd, That when, by breaking only the law of inertia--_i.e._, by moving or by resisting the motion of matter--any operation is accomplished, no other law of matter is broken. 3rd, That to break the law of inertia by Force, directed by Will, is no interference with the properties of matter. 4th, That by breaking the law of inertia only, man has power to call into play properties which make matter subservient to his objects. Nor is this man's power only. Inferior animals can also move matter, and by moving it can cause prodigious results. A minute insect, by secreting lime from sea waters, makes a coral reef, or aids in forming a cliff of chalk. A beaver cuts down a tree, and forms a swamp that changes the climate of a district; a bird carries a seed, and makes a forest on an island. Inanimate life has the same power. The plant opens its leaves to the sun, and abstracts the carbon that forms fruitful soils and beds of coal. Matter itself can by motion work on matter. The great physical powers, heat and electricity, are modes of motion. Radiation of heat causes freezing, and freezing crumbles rocks into soil, or it forms the clouds in the air, whose deluges hollow valleys; while electricity cleaves and splinters the summits of the mountain peaks. Everywhere motion, sharp or slow, works with matter; everywhere the law of inertia is broken; and everywhere the miracles of Nature are wrought out by Nature's unbroken laws, set in action or withheld by only the movement which matter has received, be it from Will in man or beast, or be it from forces which themselves are part of matter's properties. Now, since we have started from the assumption that God does exist, it is impossible to make Him an exception to the rule which holds of the spirits of inferior creatures, and even of inanimate matter. If, therefore, He can cause or stop movement, He can, without further breach of any law of Nature, bring into play the laws of Nature. Or, to state the same proposition conversely, we must admit that whatever wonders God may cause by bringing into operation a law of Nature through the means of affecting motion in matter, cannot be called a breach of the laws of Nature. It is, of course, understood that this proposition is limited to the results of motion; it does not affirm that the cause of the motion may not be a breach of a law of Nature. This question will remain for future examination; at present it is neither affirmed nor denied.