But when those to whom God has entrusted capabilities give themselves into the hands of the enemy, they become a power to destroy. When men do not make God first and last and best in everything, when they do not give themselves to Him for the carrying out of His purposes, Satan comes in, and uses in his service the minds that, given to God, could achieve great good. Under his direction, they do an evil work with great and masterly power. God designed them to work on a high plane of action, to enter into His mind, and thus to acquire an education that would enable them to work the works of righteousness. But they know nothing of this education. They are helpless. Their powers do not guide them aright; for they are under the enemy’s control (Letter 141, 1902).