The other day I finished reading Why Does The Earth Exist? by Jim Holt. The author was trying to answer the question, "Why is there something, rather than nothing?" He looked at the Platonic ideal, religion, quantum physics, cosmology, mysticism and even the idea that the universe exists because it has an ethical imperative to exist; something is better than nothing.
In the end, though, I think the poets can sum up his conclusion even better than he could himself.