The speaker describes feeling trapped and blind, and the poem follows their attempt to escape. At first the walls close in until breathing feels difficult, so they punch holes in them to let light in. When that isn't enough, they tear down the barricades over the windows. The frustrating twist is that the light arrives and they still can't see. Fighting free of what confined them hasn't fixed the problem.
The walls and windows read as a picture of an inner struggle. The poem doesn't say what caused it, but the imagery suggests something like depression, fear, or emotional pain. The mood begins in panic and desperation, then shifts to confusion and exhaustion. The last stanza turns toward a resolution: the speaker decides they must stop dwelling on the darkness and accept the light. The tone is not fully triumphant, though. Calling it a "fierce fight" shows that healing is still a battle, and the speaker is working toward hope rather than having reached it.