What does the boxes mean in poem George Mackenzie?

In the poem "George Mackenzie," the boxes represent the boxes that the character Mackenzie uses to store his collection of books. The boxes are a symbol of his passion for learning and his desire to preserve knowledge. The boxes also represent the way in which Mackenzie tries to organize and categorize the world around him. He uses the boxes to group together different types of books, and he arranges them in a way that makes sense to him. The boxes are a way for Mackenzie to make sense of the world, and they represent his attempt to impose order on chaos.