Spirit and material are the two indispensable wings of human life, and one after the other, they complement each other, which is also the law of balance in nature. When material products are extremely abundant, people have fewer requirements for culture and spirit On the other hand, the nation is in peril and the country is in dire straits, and the sound of the "Yellow River" is ringing! A terrible earthquake, a sudden attack, and poems and chants in tears, make many people surging, lift their backbones and dry their tears! Economic depression It just needs to give people a cultural soul chicken soup! What is the central point of this passage? ['The ups and downs of the economic environment have provided rare creative materials for cultural products.', 'In human life, the more abundant the material products, the less the spiritual needs will be.', 'Often when the nation is in peril and national disaster is at the head, there will always be classic cultural works.', 'When society is in crisis, people need more comfort and encouragement of literary and artistic works and cultural products.']