Mr. Babbage's illustration powerfully suggests that this ordinary procedure may be subordinate to a higher law which only permits it for a time, and … - Robert Chambers

It is remarkable of the simple substances that they are generally in some compound form. Thus oxygen and nitrogen, though in union they form the aerial envelope of the globe, are never found separate in nature. Carbon is pure only in the diamond. And the metallic bases of the earths, though the chemist can disengage them, may well be supposed unlikely to remain long uncombined, seeing that contact with moisture makes them burn. Combination and re-combination are principles largely pervading nature. There are few rocks, for example, that are not composed of at least two varieties of matter, each of which is again a compound of elementary substances. What is still more wonderful with respect to this principle of combination, all the elementary substances observe certain mathematical proportions in their unions. It is hence supposed that matter is composed of infinitely minute particles or atoms, each of which belonging to any one substance, can only (through the operation of some as yet hidden law) associate with a certain number of the atoms of any other.

In most instances, affectionate relatives and kind friends would wish to prolong the existence of the individual who has reached that age; but if we look at the happiness of mankind in general, we shall find reason to believe that, like all the other general principles of nature, this one carries the impress of an all-wise and beneficent Creator; and that if man had it in his power to alter the arrangement, it may be questioned if he could improve it. At this age the great desires of life are generally accomplished, and the tired laborer in the hardest fields of exertion, which are those of the intellect, has had some years of quiet meditation on the long battle of life to which his days of energy and hope were devoted. The world has, in general, little more use for him; and should he—however meritorious his services, however honored his gray hairs—too long remain an actual living man, seeming to fill a part of the arena in which younger and abler combatants are looking for places, the consciousness of being honored and beloved may give way before the suspicion that he has become an encumbrance to the circle he once adorned.

Is our race but the initial of the grand crowning type? Are there yet to be species superior to us in organization, purer in feeling, more powerful in device and act, and who shall take a rule over us! There is in this nothing improbable on other grounds. The present race, rude and impulsive as it is, is perhaps the best adapted to the present state of things in the world; but the external world goes through slow and gradual changes, which may leave it in time a much serener field of existence. There may then be occasion for a nobler type of humanity, which shall complete the zoological circle on this planet, and realize some of the dreams of the purest spirits of the present race.