I wasn't familiar with Roger Blanco or this collection of poems, but the way you describe the metaphor of the forest and the woodcutter gave me goosebumps. That duality you mention is very powerful: being both the wound and the axe at the same time, or feeling that by cutting down the tree you kill a part of yourself. I find it fascinating that he manages to use such a classic and rigid structure as the sonnet (which can sometimes feel outdated) to explore such raw and relevant feelings.