We need a constant sense of the ennobling power of pure thoughts and the damaging influence of evil thoughts. Let us place our thoughts upon holy things. Let them be pure and true, for the only security for any soul is right thinking. We are to use every means that God has placed within our reach for the government and cultivation of our thoughts. We are to bring our minds into harmony with His mind. His truth will sanctify us, body and soul and spirit, and we shall be enabled to rise above temptation.
– In Heavenly Places, pg. 164