It will be seen, then, that the condition of the human species, as well as that of each of its individuals, every instant depends on insensible causes, to which circumstances, frequently fugitive, give birth; that opportunity developes, that convenience puts in action: man attributes their effects to chance, whilst these causes operate necessarily, act according to fixed rules: he has frequently neither the sagacity nor the honesty to recur to their true principles; he regards such feeble motives with contempt, because he has been taught to consider them as incapable of producing such stupendous events. They are, however, these motives, weak as they may appear to be, these springs, so pitiful in his eyes, is which according to her necessary laws, suffice in the hands of Nature to move the universe. The conquests of a Gengis-Khan have nothing in them that is more strange to the eye of a philosopher than the explosion of a mine, caused in its principle by a feeble spark, which commences with setting fire to a single grain of powder; this presently communicates itself to many millions of other contiguous grains, of which the united force, the multiplied powers, terminate by blowing up mountains, overthrowing fortifications, or converting populous, well-built cities, into heaps of ruins. Thus, imperceptible causes, concealed in the bosom of Nature, until the moment their action is displayed, frequently decide the fate of man. The happiness or the wretchedness, the prosperity or the misery of each individual, as well as that of whole nations, are attached to powers which it is impossible for him to foresee, which he cannot appreciate, of which he is incapable to arrest the action. Perhaps at this moment atoms are amassing, insensible particles are combining, of which the assemblage shall form a sovereign, who will be either the scourge or the saviour of a mighty empire. Man cannot answer for his own destiny one single instant; he has no cognizance of what is passing within himself; he is ignorant of the causes which act in the interior of his machine; he knows nothing of the circumstances that will give them activity: he is unacquainted with what may develope their energy; it is, nevertheless, on these causes, impossible to be unravelled by him, that depends his condition in life. Frequently, an unforeseen rencontre gives birth to a passion in his soul, of which the consequences shall, necessarily, have an influence over his felicity. It is thus that the most virtuous man, by a whimsical combination of unlooked-for circumstances, may become in an instant the most criminal of his species.