Our heavenly Father sees the hearts of men, and He knows their characters better than they themselves know them. He sees that some have susceptibilities and powers, which, directed in the right channel, might be used to His glory to aid in the advancement of His work. He puts these persons on trial and in His wise providence brings them into different positions and under a variety of circumstances, testing them that they may reveal what is in their hearts and the weak points in their characters which have been concealed from their own knowledge. He gives them opportunities to correct these weaknesses, to polish off the rough corners of their natures, and to fit themselves for His service, that when He calls them to action they will be ready, and that angels of heaven may unite their labor with human effort in the work that must be done upon the earth. To men whom God designs shall fill responsible positions, He in mercy reveals their hidden defects, that they may look within and examine critically the complicated emotions and exercises of their own hearts, and detect that which is wrong; thus they may modify their dispositions and refine their manners. The Lord in His providence brings men where He can test their moral powers and reveal their motives of action, that they may improve what is right in themselves and put away that which is wrong. God would have His servants become acquainted with the moral machinery of their own hearts. In order to bring this about, He often permits the fire of affliction to assail them that they may become purified. “But who may abide the day of His coming? and who shall stand when He appeareth? for He is like a refiner’s fire, and like fullers’ soap: and He shall sit as a refiner and purifier of silver: and He shall purify the sons of Levi, and purge them as gold and silver, that they may offer unto the Lord an offering in righteousness.” Malachi 3:2~3L.