The fact that we are called upon to endure trial proves that the Lord Jesus sees in us something very precious, which He desires to develop. If He saw in us nothing whereby He might glorify His name He would not spend time in refining us. We do not take special pains in pruning brambles. Christ does not cast worthless stones into His furnace. It is valuable ore that He tests.21Testimonies for the Church 7:214 CCh 54.6
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, 3 422Testimonies for the Church 4:84. CCh 54.7
God leads His people on, step by step. He brings them up to different points calculated to manifest what is in the heart. Some endure at one point, but fall off at the next. At every advanced point the heart is tested and tried a little closer. If the professed people of God find their hearts opposed to this straight work, it should convince them that they have a work to do to overcome, if they would not be spewed out of the mouth of the Lord.231T 187 CCh 55.1
Just as soon as we realize our inability to do God's work and submit to be guided by His wisdom, the Lord can work with us. If we will empty the soul of self, He will supply all our necessities.24Testimonies for the Church 7:213 CCh 55.2