Contributing to the Book of Life

I found the second video interesting. He is reciting a poem that ends by asking a question and then gives this answer, "...That the powerful play goes on, and you may contribute a verse." He then asks the boys "What will your verse be?" I thought this was asking what your purpose in life is and to find it. God made all of us unique so we could all contribute our own "verse" to the "book of life." It not only is trying to get us to find our purpose of life, but it makes us think that in order to do that, we have to take our own paths.