① It does not fit the meaning of the question. "Human perfection needs to be realized in culture" means that taking the initiative to perceive excellent culture can improve people's humanistic quality and emphasize the influence of culture on people and the shaping of life by excellent culture;

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② It does not fit the meaning of the title. "Use the softest thing in the world to ride on the wisest person in the world." It means that although water is weak, it can flow through the hardest things, emphasizing that the influence of culture on people is subtle. ;

③ In line with the meaning of the title, "Everyone appreciates his own beauty, the beauty of beautiful people, beauty and beauty, the world is unified" means: "Everyone appreciates his own beauty", that is, each nation promotes its own beautiful Cultural traditions; "The beauty of beauty", if you don't have it, I will learn from others, or even if you have it, I will learn from others; "The beauty of beauty", we should also take other people's excellent culture and learn from it. "Beauty and beauty make the world unified", so that the excellent cultures of various ethnic groups and countries tolerate and learn from each other, then it can present a colorful world with diverse cultures, reflecting respect for cultural diversity;

④ In line with the meaning of the title, "the world is wonderful because of differences, communication is necessary because of differences, and innovation bursts out because of communication" is the expression and requirement of respecting the world's cultural diversity.

Therefore, choose D for this question.