3 Ne. 12:27-28; D&C 6:16; Matt. 5:27-28; Job 42:2; Psalm 94:11; Miracle of Forgiveness, Kimball, pp. 107-109; refer in this text to Mosiah 4:30
“In the armory of thought man forges the weapons by which he destroys himself; he also fashions the tools with which he builds himself heavenly mansions of joy and strength and peace… . Between these two extremes are all grades of character, and man is the maker and master … and shaper of condition, environment and destiny… . All that a man achieves and all that he fails to achieve is the direct result of his own thoughts.” (James Allen, As a Man Thinketh)
“All evils to which so many become addicted begin in the mind and in the way one thinks. Experience teaches that when the will and imagination are in conflict, the imagination usually wins. What we imagine may defeat our reason and make us slaves to what we taste, see, hear, smell, and feel in the mind’s eye. The body is indeed the servant of the mind.” (Joseph B. Wirthlin, Ensign, May 1982, pp. 23-25)