Behind+all+this+some+great+happiness+is+hiding.

Although the random appearance of this phrase throughout the poem is baffling, it is definitely a recurring concept in the poem. This in itself is confusing, because the general attitude of this poem is depressing. This phrase, although possibly perceivable as cryptic, is in my opinion, pretty self explanatory. "all this", clearly represents the sorrow and grief that comes from mourning the death of friends. The part representing a great happiness, I think, is up for interpretation. The poet is trying to get you to think about the happiness that can come from such a terrible tragedy as the loss of a friend. Perhaps one can conclude that the person in question lived a great long life, or, they weren't right for this world and now they are in a better place. And so on, and so forth. Overall, I think the message of this sentence is exactly as it appears: Behind the terrible outset of death and dying, there is some sentimental hope and/or happiness that can be drawn from it.

Eddie - What might the sentimental hope or happiness be? Why is it hiding?