If our house is built upon a rock with the brick and mortar of good works, it will withstand the storms and perils of life and preserve us for an eternal inheritance hereafter. If it is built upon the sands of evil with the rusty nails and rotting timber of carnal things, it will be destroyed when the rains and the winds and the floods beat upon it. Let us then learn from our ancient Friend where and how he would have us build the house that shall be ours in the days of our flesh. – Bruce R. McConkie, “Upon This Rock,” Ensign (CR) May 1981