We may attain to an intuitive knowledge of the existence and activity of the will in unorganised nature in quite a different and a sublime manner if we study the problem of the three heavenly bodies, and thus learn more accurately and specially the course of the moon round the earth. By the different combinations which the constant change of the position of these three heavenly bodies towards each other introduces, the course of the moon is now accelerated; now retarded, now it approaches the earth, and again recedes from it; and this again takes place differently in the perihelion of the earth from in its aphelion, all of which together introduces such irregularity into the moon’s course that it really obtains a capricious appearance; for, indeed, Kepler’s third law is no longer constantly valid, but in equal times it describes unequal areas. The consideration of this course is a small and separate chapter of celestial mechanics, which is distinguished in a sublime manner from terrestrial mechanics by the absence of all impact and pressure, thus of the _vis a tergo_ which appears to us so intelligible, and indeed of the actually completed case, for besides _vis inertiœ_ it knows no other moving and directing force, except only gravitation, that longing for union which proceeds from the very inner nature of bodies. If now we construct for ourselves in imagination the working of this given case in detail, we recognise distinctly and directly in the moving force here that which is given to us in self‐consciousness as will. For the alterations in the course of the earth and the moon, according as one of them is by its position more or less exposed to the influence of the sun, are evidently analogous to the influence of newly appearing motives upon our wills, and to the modifications of our action which result.