The answer from God’s word:
“Man lost his God-fearing heart after being corrupted by Satan and lost the function that one of God’s creatures should have, becoming an enemy disobedient to God. Man lived under Satan’s domain and followed Satan’s orders; thus, God had no way to work among His creatures, and was all the more unable to win fear from His creatures. Man was created by God, and ought to worship God, but man actually turned his back to God and worshiped Satan. Satan became the idol in man’s heart. Thus God lost His standing in man’s heart, which is to say that He lost the meaning of His creation of man….”
from “God and Man Will Enter Into Rest Together” in The Word Appears in the Flesh
“After several thousand years of corruption, man has become numb and dull-witted, a demon that opposes God, to the extent that man’s rebelliousness toward God has been documented in the books of history, and even man himself is incapable of giving a full account of his rebellious behavior—for man has been profoundly corrupted by Satan, and has been led astray by Satan that he knows not where to turn. Even today, man still betrays God: When man sees God, he betrays Him, and when he cannot see God, so too does he betray Him. There are even those who, having witnessed God’s curses and God’s wrath, still betray Him. And so I say that man’s sense has lost its original function, and that man’s conscience, too, has lost its original function. … Born into such a filthy land, man has been severely blighted by society, he has been influenced by feudal ethics, and he has been taught at ‘institutes of higher learning.’ The backward thinking, corrupt morality, mean view on life, despicable philosophy, utterly worthless existence, and depraved lifestyle and customs—all of these things have severely intruded upon man’s heart, and severely undermined and attacked his conscience. As a result, man is ever more distant from God, and ever more opposed to Him. Man’s disposition becomes more vicious by the day, and there is not a single person who will willingly give up anything for God, not a single person who will willingly obey God, nor, moreover, a single person who will willingly seek the appearance of God. Instead, under the domain of Satan, man does nothing but pursue pleasure, giving himself over to the corruption of the flesh in the land of mud.”
from “To Have an Unchanged Disposition Is to Be in Enmity to God” in The Word Appears in the Flesh
“None actively seek out the footsteps or appearance of God, and none wish to exist in the care and keeping of God. Rather, they are willing to rely on the corrosion of Satan and the evil one in order to adapt to this world and to the rules of life the wicked mankind follows. At this point, the heart and spirit of man are sacrificed to Satan and become its sustenance. Moreover, the human heart and spirit become a place in which Satan can reside and a fitting playground for it. In this way, man unknowingly loses his understanding of the principles of being human, and of the worth and purpose of human existence. The laws from God and the covenant between God and man gradually fade away in man’s heart until man no longer seeks or pays heed to God. As time passes, man no longer understands why God created man, nor does he understand the words that come from the mouth of God or realize all that is from God. Man begins to resist the laws and decrees from God; the heart and spirit of man become deadened. …”
from “God Is the Source of Man’s Life” in The Word Appears in the Flesh
“From when man first had social sciences, the mind of man was occupied by science and knowledge. Then science and knowledge became tools for the ruling of mankind, and there was no longer sufficient room for man to worship God, and no more favorable conditions for the worship of God. The position of God sunk ever lower in the heart of man. A world in man’s heart with no place for God is dark, empty without hope. And so arose many social scientists, historians, and politicians to express theories of social science, the theory of human evolution, and other theories that contravene the truth that God created man, to fill the heart and mind of man. And in this way, those who believe that God created everything become ever fewer, and those who believe in the theory of evolution become ever greater in number. More and more people treat records of the work of God and His words during the Old Testament age as myths and legends. In their hearts, people become indifferent to the dignity and greatness of God, to the tenet that God exists and holds dominion over all things. The survival of mankind and the fate of countries and nations are no longer important to them. Man lives in a hollow world only concerned with eating, drinking, and the pursuit of pleasure. … Few people take it upon themselves to seek out where God does His work today, or to look for how He presides over and arranges the destination of man. And in this way, human civilization unconsciously becomes ever more incapable of meeting the wishes of man, and there are even many people who feel that, living in such a world, they are less happy than people who have gone. Even people of countries that used to be highly civilized air such grievances. For without the guidance of God, no matter how much rulers and sociologists wrack their brains to preserve human civilization, it is to no avail. No one can fill the emptiness in man’s heart, for no one can be the life of man, and no social theory can free man from the emptiness with which he is afflicted. Science, knowledge, freedom, democracy, leisure, comfort, these are but a temporary respite. Even with these things, man will inevitably sin and bemoan the injustices of society. These things cannot allay man’s craving and desire to explore. Because man was made by God and the senseless sacrifices and explorations of man can only lead to more distress. Man will exist in a constant state of fear, will not know how to face the future of mankind, or how to face the path that lies ahead. Man will even come to fear science and knowledge, and fear even more the feeling of emptiness within him. In this world, regardless of whether you live in a free country or one without human rights, you are utterly incapable of escaping the fate of mankind. Whether you are the ruler or the ruled, you are utterly incapable of escaping the desire to explore the fate, mysteries, and destination of mankind. Much less are you capable of escaping the bewildering sense of emptiness. Such phenomena, which are common to all of mankind, are called social phenomena by sociologists, yet no great man can come forth to solve such problems. Man, after all, is man. The position and life of God cannot be replaced by any man. Mankind does not just require a fair society in which everyone is well-fed and is equal and free, but the salvation of God and His provision of life to them. Only when man receives the salvation of God and His provision of life to them can the needs, yearning to explore, and spiritual emptiness of man be resolved. If the people of a country or a nation are unable to receive the salvation and care of God, then such a country or nation will tread the road to ruin, toward darkness, and shall be annihilated by God.”
from “God Presides Over the Fate of All Mankind” in The Word Appears in the Flesh
“… in the time of Noah, men had been eating and drinking, marrying and giving in marriage to such a point that it was unbearable for God to witness, so He sent down a great flood to destroy mankind and left behind only Noah’s family of eight and all kinds of birds and beasts. In the last days, however, those kept by God are all those who have been loyal to Him until the end. Though both were times of great corruption unbearable for God to witness, and mankind in both ages was so corrupt that he denied God as the Lord, all men in the time of Noah were destroyed by God. Mankind in both ages has grieved God greatly, yet God has remained patient with men in the last days until now. Why is this? Have you never given thought to this? If you truly do not know, then let Me tell you. The reason that God can deal graciously with men in the last days is not that they are less corrupt than men in the time of Noah or that they have shown repentance to God, much less is it that God cannot bear to destroy men in the last days where technology has advanced. Rather, it is that God has work to do in a group of men in the last days and this will be done by God incarnate Himself. Furthermore, God shall choose a part of this group as His objects of salvation, the fruit of His management plan, and bring such men with Him into the next age.”
from “Do You Know? God Has Done a Great Thing Among Men” in The Word Appears in the Flesh
“God laments the future of mankind, and grieves the fall of mankind. He feels sorrow for mankind’s slow march toward decline and the path of no return. Mankind has broken the heart of God and renounced Him to seek the evil one. None has ever given thought to the direction in which a mankind such as this will move. It is precisely for this reason that none sense the anger of God. None seek a way to please God or try to become closer to God. Moreover, none seek to comprehend the sorrow and pain of God. Even after hearing the voice of God, man continues on his path away from God, evading the grace and care of God, and shunning the truth of God, and he would rather sell himself to Satan, the enemy of God. And who has given any thought as to how God will act toward an unrepentant man who has dismissed Him? None know that the repeated reminders and exhortations of God are because He holds in His hands an unprecedented disaster that He has prepared, one that will be unbearable for the flesh and soul of man. This disaster is not merely a punishment of the flesh but of the soul as well. You must know this: When the plan of God is made void and when His reminders and exhortations beget no response, what anger will He unleash? This will be like nothing that has heretofore been experienced or heard by any creation. And so I say, this disaster is unprecedented and will never be repeated. This is because only one creation and one salvation are within the plan of God. This is the first time and also the last.”
from “God Is the Source of Man’s Life” in The Word Appears in the Flesh