First Nephi 6:4-5
Nephi's reveals his intentions for writing his record: "to persuade men to come unto...God...and be saved." Then he reveals a truth about not only his writings, but the entire Book of Mormon: it is pleasing unto those who are not of the world. Many people will read the Book of Mormon, many will sincerely put effort into it. It is a great detector - those who are not of the world will find it pleasing.