What do you think is good about Xu Bing's work "Dust"?

In fact, this work is not talking about the 9.11 incident itself, but exploring the relationship between spiritual space and material space. What is more eternal and more powerful. Today's human beings need to seriously and calmly rethink those questions that have become rusty, but are the most basic and important - what is to be revered and pursued? What is true power? Where is religion? Where is the point of origin for the survival and mutual respect of different doctrines and communities***? This is not an abstract, esoteric, scholarly proposition, but the most basic thing that is relevant to every human being alive, otherwise something will go wrong with the human race.