The answer from God’s word:
“The sins of man were forgiven because of the work of God’s crucifixion, but man continued to live in the old, corrupt satanic disposition. As such, man must be completely saved from the corrupt satanic disposition so that the sinful nature of man is completely cast away and never again develops, thus allowing the disposition of man to be changed. This requires man to understand the path of growth in life, the way of life, and the way to change his disposition. It also needs man to act in accordance with this path so that the disposition of man can gradually be changed and he can live under the shining of the light, and that he can do all things in accord with the will of God, cast away the corrupt satanic disposition, and break free from Satan’s influence of darkness, thereby emerging fully from sin. Only then will man receive complete salvation. When Jesus was doing His work, man’s knowledge of Him was still vague and unclear. Man always believed that He was the son of David and proclaimed Him to be a great prophet and the benevolent Lord who redeemed man’s sins. Some, based on faith, became healed just by touching the edge of His garment; the blind could see and even the dead could be restored to life. However, man could not discover the corrupt satanic disposition deeply rooted within him and neither did man know how to cast it away. Man received much grace, such as the peace and happiness of the flesh, the blessing of the entire family upon the faith of one, and the healing of sicknesses, and so on. The rest were the good deeds of man and their godly appearance; if man could live based on such, he was considered a good believer. Only such believers could enter heaven after death, which means that they were saved. But, in their lifetime, they did not understand at all the way of life. They merely committed sins, then made confession in a constant cycle without any path toward a changed disposition; such was the condition of man in the Age of Grace. Has man received complete salvation? No! Therefore, after that stage was complete, there is still the work of judgment and chastisement. This stage makes man pure through the word so as to give man a path to follow. This stage would not be fruitful or meaningful if it continued with the casting out of demons, for the sinful nature of man would not be cast away and man would only stop upon the forgiveness of sins. Through the sin offering, man has been forgiven his sins, for the work of the crucifixion has already come to an end and God has prevailed over Satan. But the corrupt disposition of man still remains within them and man can still sin and resist God; God has not gained mankind. That is why in this stage of work God uses the word to reveal the corrupt disposition of man and asks man to practice in accordance with the right path. This stage is more meaningful than the previous one and more fruitful as well, for now it is the word that directly supplies life for man and enables the disposition of man to be completely renewed; it is a stage of work more thorough. Therefore, the incarnation in the last days has completed the significance of God’s incarnation and completely finished God’s management plan for the salvation of man.”
from “The Mystery of the Incarnation (4)” in The Word Appears in the Flesh
“In the last days, Christ uses a variety of truths to teach man, reveal the essence of man, and dissect his words and deeds. These words comprise various truths, such as man’s duty, how man should obey God, how man should be loyal to God, how man ought to live out the normal humanity, as well as the wisdom and disposition of God, and so on. These words are all focused on the essence of man and his corrupt disposition. In particular, those words that reveal how man spurns God are spoken in regards to how man is an embodiment of Satan and an enemy force against God. When God does the work of judgment, He does not simply make clear the nature of man with just a few words, but carries out revelation, dealing, and pruning over the long term. Such manner of revelation, dealing, and pruning cannot be substituted with ordinary words but with the truth that man does not possess at all. Only such manner of work is deemed judgment; only through such judgment can man be persuaded, be thoroughly convinced into submission to God, and gain true knowledge of God. What the work of judgment brings about is man’s understanding of the true face of God and the truth about his rebelliousness. The work of judgment allows man to gain much understanding of the will of God, of the purpose of God’s work, and of the mysteries that could not be understood by man. It also allows man to recognize and know his corrupt substance and the roots of his corruption, as well as to discover the ugliness of man. These effects are all brought about by the work of judgment, for the substance of such work is actually the work of opening up the truth, way, and life of God to all those who have faith in Him.”
from “Christ Does the Work of Judgment With the Truth” in The Word Appears in the Flesh
“At the time, Jesus did much work that was incomprehensible to His disciples, and said much that people did not understand. This is because, at the time, He did not give explanation. Thus, several years after He departed, Matthew created His genealogy, and others also did much work that was of the will of man. Jesus did not come to perfect and gain man, but to do one stage of work: bringing forth the gospel of the kingdom of heaven and completing the work of the crucifixion—and so once Jesus was crucified, His work came to a complete end. But in the current stage—the work of conquest—more words must be spoken, more work must be done, and there must be many processes. So too must the mysteries of the work of Jesus and Jehovah be revealed, so that all people may have understanding and clarity in their belief, for this is the work of the last days, and the last days are the end of God’s work, the time of this work’s conclusion. This stage of work will elucidate for you the law of Jehovah and the redemption of Jesus, and is principally so that you may understand the entire work of God’s six-thousand-year management plan, and appreciate all the significance and substance of this six-thousand-year management plan, and understand the purpose of all the work done by Jesus and the words He spoke, and even your blind credence in and adoration of the Bible. All this it will allow you to perceive. You will come to understand both the work done by Jesus, and the work of God today; you will understand and behold all of the truth, the life, and the way. In the stage of work done by Jesus, why did Jesus depart without concluding God’s work? Because the stage of Jesus’ work was not the work of conclusion. When He was nailed to the cross, the words that He had spoken also came to an end; after His crucifixion, His work consequently finished. The current stage is different: Only after the words are spoken to the end and God’s entire work is concluded will His work have finished. During Jesus’ stage of work, there were many words that remained unsaid, or which were not fully articulated. Yet Jesus cared not what He did or did not say, for His ministry was not a ministry of words, and so after He was nailed to the cross He departed. That stage of work was chiefly for the sake of the crucifixion, and is unlike the stage today. This stage of work is principally for the sake of completion, of clearing up, and of bringing all work to a conclusion. If the words are not spoken to their very end, there will be no way of concluding this work, for in this stage of work all work is brought to an end and accomplished using words. At the time, Jesus did much work that was incomprehensible to man. He departed quietly, and today there are still many who do not understand His words, whose understanding is erroneous yet still believed by them to be correct, who do not know that they are wrong. In the end, this current stage will bring God’s work to a complete end, and will provide its conclusion. All will come to understand and know of God’s management plan. The conceptions within man, his intentions, his erroneous understanding, his conceptions toward the work of Jehovah and Jesus, his views about the Gentiles, and all his absurdities will be corrected. And man will understand all the right paths of life, and all the work done by God, and the entire truth. When that happens, this stage of work will come to an end.”
from “The Vision of God’s Work (2)” in The Word Appears in the Flesh