themselves become acquainted with it? How did they form ideas of a substance, that taking their own account of it, is not, under any of its circumstances, either directly or by analogy, cognizable to the mind of man? If they could positively achieve this, there would no longer be any mystery in Nature: it would be as easy to conceive the time when all was nothing, when all shall have passed away, to account for the production of every thing we behold, as to dig in a garden or read a lecture.--Doubt would vanish from the human species; there could no longer be any difference of opinion, since all must necessarily be of one mind on a subject so accessible to every enquirer. But it will be replied, the materialist himself admits, the natural philosophers of all ages have admitted, elements and atoms, beings simple and indivisible, of which bodies are composed:--granted; they have no more: they have also admitted that many of these atoms, many of these elements, if not all, are unknown to them: nevertheless, these simple beings, these atoms of the materialist, are not the same thing with the spirit, or the soul of the metaphysician. When the natural philosopher talks of atoms--when he describes them as simple beings, he indicates nothing more than that they are homogeneous, pure, without mixture: but then he allows that they have extent, consequently parts, are separable by thought, although no other natural agent with which he is acquainted is capable of dividing them: that the simple beings of this genus are susceptible of motion--can impart action--receive impulse--are material--are placed in Nature--are indestructible;--that consequently, if he cannot know them from themselves, he can form some idea of them by analogy: thus he has done that intelligibly, which the metaphysician would do unintelligibly: the latter, with a view to render man immortal, finding difficulties to his wish, from seeing that the body decayed--that it has submitted to the great, the universal law--has, to solve the difficulty, to remove the impediment, given him a soul, distinct from the body, which he says is exempted from the action of the general law: to account for this, he has called it a spiritual being, whose properties are the negation of all known properties, consequently inconceivable: had he, however, had recourse to the atoms of the former--had he made this substance the last possible term of the division of matter--it would at least have been intelligible; it would also have been immortal, since, according to the reasonings of all men, whether metaphysicians, theologians, or natural philosophers, an atom is an indestructible element, that must exist to all eternity.