What epistemology of loss does the poem contain?

Please answer the following question in about 40 words .
My question is from the book ' First Flight' and from the chapter ' The Ball Poem' .

Dear Student,

The epistemology of loss in the poem is that every one loses things in life but one has to forget it. Loss is an abstract idea. In a world of possession, there will be losses. In the poem, the epistemology of loss is the greatest lesson, the boy is learning. It teaches him to value and preserve his cherished things. It also teaches him to recover from the loss and move on with his life.

Regards