What do you think of this poem?

Always difficult to encomp something so enigmatic as Time (or space and matter). But you have handled it well. The last stanza is excellent. I also like the first stanza, especially the break in the last line and the question answered: 'It must'. The fact that you had writer's block has slowed you down and perhaps made this better? Anyway you achieved a very good poem in the end. Well done.