Chapter I.—Defence of the Truth Should Precede Discussions Regarding It. [This argument was adapted to the times, and to those to whom it was addressed, with great rhetorical art and concealment of art. Its faults arise from the defective science of the age, and from the habits of thought and of public instruction then in fashion. He does not address himself to believers, but to sceptics, and meets them on their highest levels of speech and of reason.]