Familiarity with the scriptures does not ensure familiarity with God or the things of the Spirit. In fact, one who reads the scriptures and interprets them to support the plan of Satan is worse off than the individual who has not read them, some have wrested the scriptures, and have gone far astray because of this thing (Alma 41:1), and if ye will wrest them it shall be to your own destruction (Alma 13:20). Those familiar with the scriptures, who quote and interpret them incorrectly, are the ones who teach "the philosophies of men, mingled with scripture." The Book of Mormon, itself was brought to light to combat these many misunderstandings, And this I do that I may establish my gospel, that there may not be so much contention; yea, Satan doth stir up the hearts of the people to contention concerning the points of my doctrine; and in these things they do err, for they do wrest the scriptures and do not understand them (DC 10:63).
The Savior himself testified that the scriptures were given specifically to testify of Him, Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me (Jn 5:39).