Have you tasted my poem yet?

The difficulty of this poem is that it has a two part structure. The last six lines construct a chain of causality running backwards in time. Reversing it, it runs something like this: pains -> opium -> gains (loss of pain) -> losses (loss of wisdom) -> woes -> light (burning woes). This chain reaches up from the end of the poem, and ends in line three. Lines one and two express dejected sight, grieving for hopes of light. Thus the first two lines are directly connected, and the last six lines are directly connected, but these two parts are only connected by hope. Remarkably, the theme of this poem is not frustrated hope, but the concomitants of getting what one desires-- that light implies woes, pain, etc. To me, the condensation of this abstraction is remarkable, if I do not mistake your intent. But in that case, the plot of the poem, such as it is, becomes superfluous, and the novelistic details (soporifics, pains) carry the reader away from the thematic centre of the poem, where he does not find resolution. Incisive psychological poems are difficult to write. I would say you have made an admirable attempt, but I do not think the structure is well polished yet.