Force-matter[50] is nothing but the product of the spirit's activity; in it we find many and divers properties--density, weight, temperature, volume, elasticity, cohesion, &c., because we judge it from our sense perceptions; but in reality, we know it so little, that the greatest thinkers have called it "a state of consciousness," _i.e._, an impression produced by it within ourselves.[51] It is the result of the will of the supreme Spirit, which creates "differences" (forms) in unfathomable homogeneous Unity, which is incarnated in them and produces the modifications necessary for the development of its powers, in other words, for the accomplishment of their evolution. As this evolution takes place in the finite--for the Infinite can effect its "sacrifice," _i.e._ its incarnation,[52] only by limiting itself--it is progressive, proceeding from the simple to the complex. Each incarnate, divine "fragment"[53] at first develops the simpler qualities and acquires the higher ones only by degrees; these qualities can appear only by means of a vehicle of matter, just as the colour-producing properties of a ray of light only become manifest with the aid of a prism. Form plays the part of the revealer of the qualities latent in the divine germ (the soul); the more complex this form becomes, the more atomic divisions it has in a state of activity; the greater the number of senses it has awake, the greater the number of qualities it expresses. In this process, we see at work, three main factors; _Spirit_,[54] awakening within itself _vibrations_,[55] which assume _divers appearances_.[56] These three factors are one; force-matter and form cannot exist without the all-powerful, divine Will (Spirit), for this is the supreme Being, who, by his Will, creates force matter, by his Intelligence gives it a form, and animates it with his Love. Force-matter is the blind giant, who, in the Sankhya philosophy, carries on his shoulders the lame man who can see--a giant, for it is activity itself; and blind, because this activity is directed only by the intelligent Will of the Spirit. The latter is lame, because when it has not at its disposal an instrument of form-matter, it cannot act, it cannot appear, it is no longer manifested, having disappeared with the great periodical dissolution of things which the poetical East calls the inbreathing of Brahma.