Though the young man is slandered, this blame proves his worth—beauty itself attracts envy and slander—yet his actual purity is undermined by suspicion, making it impossible for him to receive full honor despite his innocence.
Sonnet 70 presents beauty as inherently subject to attack. The metaphor of the crow in heaven's air perfectly captures this: beauty creates the contrast that makes evil visible, and evil is drawn to beauty precisely because of its purity. The speaker tries to reframe slander positively (lines 5–8): slander proves value; the young man's purity survives assault. Yet the couplet undercuts this consolation with devastating logic: the speaker cannot fully praise the young man because suspicion itself ('some suspect of ill') masks his beauty. Even if the suspicion is false—even if he is entirely innocent—the suspicion remains, obscuring his virtue. This is the cruelest paradox: innocence doesn't dispel suspicion; only guilt would justify it. The young man is trapped in the impossible position of the beautiful and innocent who cannot prove their innocence.
The sonnet's political dimension emerges in lines 11–12: 'Yet this thy praise cannot be so thy praise, / To tie up envy, evermore enlarged.' Praise itself cannot contain envy; the more you praise someone, the more envy grows. This is a statement about social dynamics: worth invites not admiration but jealousy. The young man's beauty does not earn him safety or universal love; it makes him a target. His 'pure unstained prime' is precisely what 'canker vice' loves. The sonnet suggests that excellence in a corrupt world is not redemptive but dangerous. The only way to 'owe' kingdoms of hearts would be if he were not suspected—but suspicion is inevitable when beauty is manifest. He is trapped by his own perfection into a condition where full recognition is impossible.
Like being so beautiful and talented that people automatically suspect you of something—they can't believe you're genuinely good, so they assume there's a dark side. You're constantly being judged, and no amount of goodness can fully overcome the suspicion your beauty provokes.