Chapter I. Scientific Acquisition

     The composition of the revolutionary spirit.—Scientific
     acquisition its first element.

On seeing a man with a somewhat feeble constitution, but healthy in appearance and of steady habits, greedily swallow some new kind of cordial and then suddenly fall to the ground, foam at the mouth, act deliriously and writhe in convulsions, we at once surmise that this agreeable beverage contained some dangerous substance; but a delicate analysis is necessary to detect and decompose the poison. The philosophy of the eighteenth century contained poison, and of a kind as potent as it was peculiar; for, not only is it a long historic elaboration, the final and condensed essence of the tendency of the thought of the century, but again its two principal ingredients have this peculiarity, that, separate, they are salutary, and in combination they form a venomous compound.