You, however, continue in the things you have learned and become convinced of, knowing from whom you have learned them, and that from childhood you have known the sacred writings which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus. All Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness
At some level you need to decide if the Book of Mormon is scripture. You need to decide if the New Testiment is scripture. Or you can read it litterally and decide all text is inspired by God... even slashdot posts. Or you could read it more litterally and decide that only the sacred texts that were read by the literal person Timothy was writing too count.