Why is it important to have both the Bible and the Book of Mormon?

From “The Power of Deliverance,” Liahona and Ensign, May 2012, 94–97.

L. Tom Perry
The members of the Quorum of the Twelve Apostles are special witnesses of Jesus Christ.
Special Witness(click to view larger)

That Ye May Know, by Gary L. Kapp, may not be copied

Both the Bible and the Book of Mormon are necessary for our salvation.

What a blessing it is to have the account of the mission of our Lord and Savior declared in the Book of Mormon to add a second witness to the doctrine declared in the Bible.

Both are necessary for us to teach and learn about the full and complete doctrine of Christ.