First of all, I wish the reader to recall the passage with which we closed the Second Book,—a passage occasioned by the question, which met us then, as to the end and aim of the will. Instead of the answer to this question, it appeared clearly before us how, in all the grades of its manifestation, from the lowest to the highest, the will dispenses altogether with a final goal and aim. It always strives, for striving is its sole nature, which no attained goal can put an end to. Therefore it is not susceptible of any final satisfaction, but can only be restrained by hindrances, while in itself it goes on for ever. We see this in the simplest of all natural phenomena, gravity, which does not cease to strive and press towards a mathematical centre to reach which would be the annihilation both of itself and matter, and would not cease even if the whole universe were already rolled into one ball. We see it in the other simple natural phenomena. A solid tends towards fluidity either by melting or dissolving, for only so will its chemical forces be free; rigidity is the imprisonment in which it is held by cold. The fluid tends towards the gaseous state, into which it passes at once as soon as all pressure is removed from it. No body is without relationship, _i.e._, without tendency or without desire and longing, as Jacob Böhme would say. Electricity transmits its inner self-repulsion to infinity, though the mass of the earth absorbs the effect. Galvanism is certainly, so long as the pile is working, an aimless, unceasingly repeated act of repulsion and attraction. The existence of the plant is just such a restless, never satisfied striving, a ceaseless tendency through ever-ascending forms, till the end, the seed, becomes a new starting-point; and this repeated _ad infinitum_—nowhere an end, nowhere a final satisfaction, nowhere a resting-place. It will also be remembered, from the Second Book, that the multitude of natural forces and organised forms everywhere strive with each other for the matter in which they desire to appear, for each of them only possesses what it has wrested from the others; and thus a constant internecine war is waged, from which, for the most part, arises the resistance through which that striving, which constitutes the inner nature of everything, is at all points hindered; struggles in vain, yet, from its nature, cannot leave off; toils on laboriously till this phenomenon dies, when others eagerly seize its place and its matter.