Symbols can be powerful teaching tools. “Jacob admonished his brethren to do some shaking of their own—to shake off their chains of sin. Instead of being bound to the evil one, he counsels them to bind themselves to ‘that God who is the rock of your salvation’; the image of rock in the scriptures represents something firm, solid, and immovable” (Ogden and Skinner, Book of Mormon, 1:159).