The popular doubt of the day is chiefly born of popular assaults on Christianity. The great bulk of the prevailing skepticism is unscientific. Dashing, audacious attacks on minor details of the Christian system have caught the ear of the public; and the very elaborateness of the defense has so magnified these details, as to lift them to undeserved conspicuity. Christianity can afford to take the aggressive, to compel a hearing, to challenge popular doubt to look some of Christianity's more important phases honestly in the face. Here are its "Book" and its "Christ." Here are its definite doctrines, and its views of man, matching marvelously the facts. Here are its successes, challenging, in anything like the same conditions, an approach to comparison. These things, and things like them, are to the last degree evidential. Their exhibition is their demonstration. They are Christianity's setting, enivronment, substance, achievement. They are the ever increasing marvels and the ever brightening glories of the gospel. - Preface.