So, looking at 'Sonnet 129' - the 'Th' expense of spirit' one - the devices Shakespeare deploys are pretty much a masterclass in conveying self-loathing through structure. The most glaring thing is the antithesis, right? He's constantly pitting opposing ideas against each other: 'enjoy'd' and 'despised,' 'heaven' and 'hell.' It's all about the extreme swings from lust to disgust. That's reinforced by the violent imagery - 'murderous, bloody, full of blame' - which isn't just description, it's a metaphor for what the experience does to the soul. You also get this relentless, almost frantic rhythm that mirrors the speaker's lack of control, and the couplet at the end feels less like a resolution and more like a weary, resigned sigh. It’s a poem where the form, usually so controlled, feels like it's straining to contain the chaotic emotion, which is kind of the whole point.
I always come back to the way he uses paradox, too. Lines like 'A bliss in proof, and proved, a very woe' perfectly capture that post-regret. The literary devices aren't just decoration; they are the engine of the poem's meaning, showing how reason gets completely overthrown by passion and its aftermath. I think the personification of lust as a hunter or a madman is what sticks with me longest.