If, as we have labored to teach, matter always symbolizes mind, we should expect to find it also pervaded with the unity pertaining to its lower rank, and so indeed we find it. In its noblest form the unity of matter is that organization of it which builds it into living temples for the indwelling spirits, those houses not made with hands--the bodies of noble men, of fair and loving women. In a lower form, it gives that sweet and strange affinity which adds the glory of orderly arrangement to its elements, gifting them with the fair variety of change and assimilation that turns the dust into crystal, and separates the waters above the firmament from those below. It is the walking and clinging _together_ that gives power to the winds, weight to the waves, heat to the sunbeams, and stability to the mountains. It is the 'clinging together' which throws our syllables into words, gives metre to poetry, and melody and harmony to sound. Indeed, the clinging together of sounds, as seized by the ear in _time_, with the ever forming and living ebb and flow of widely different rhythms, exerting the most mysterious influences upon the soul, is not less remarkable than its more familiar history in space. Manifold, indeed, would be the generalizations of the different species of unity, for it is the secret link of all being. We have the unity of separate things subjected to one and the same influence, as the unity of clouds as they are driven by parallel winds, or ordered by electric currents: there is the unity of myriads of sea waves, of the bending and undulating of forest masses. In creatures capable of will, there would be the unity of acts controlled, in all their apparent variety, by its directing power; and the unity of emotions in the masses, when swayed by some common impulse. There is also the unity of the origin of things arising from one source, always suggesting their common brotherhood: in matter this is manifested in the unity of the branches of the trees, of the petals and starry rays of flowers, of the beams of light, of heat, &c., &c.; in spiritual creatures it is their filial relation to Him from whom they have their being. There is the unity of sequence, which is that of things which form links in chains, steps in ascent, and stages in journeys; this, in matter, is the unity of communicable forces in their continuance and propagation from one thing to another; it is the passing upward and downward of beneficent effects among all things; it is the melody of sounds; the beauty of continuous lines; and orderly successions of motions and times. In spiritual creatures, it is their own constant building up by true knowledge and consecutive efforts to higher perfection, and the singleness and straightforwardness of their tendencies to more complete union with God.