Classicly

If it has been established as a precedent that every book should have a dedication, it has been more imperatively enjoined that none should make its appearance without a preface. These are matters of punctilio which it might appear ill-breeding to neglect, and constitute the soft and easy civilities through which books find favor in the eyes of their readers. As no one is disposed kindly to welcome the rude boor who intrudes into his presence, and without a polite nod or pleasant smile at once encounters him with rough speech, so none is inclined to enter upon the perusal of a volume without first knowing somewhat concerning it.