Harper Lee’s To Kill a Mockingbird is conventionally read as a moral fable about racial injustice and the costs of moral courage. This essay argues that beneath its juridical surface the novel articulates a theology of vulnerability whose deepest concerns are ontological rather than ethical. The mockingbird—Lee’s figure for that which only sings—names a category of being whose expressive innocence cannot survive the social and epistemic structures that encounter it. Reading Tom Robinson as exposed innocence and Boo Radley as concealed innocence, and bringing the doublet into dialogue with the Akedah, the Levitical scapegoat, and the Book of Job, the paper proposes that the destruction of the mockingbird is structurally analogous to the rupture of unmediated divine presence in Lurianic theology. Drawing on Wolfson’s apophatic acosmism, the Lurianic and Chabad doctrines of tzimtzum, and the post Holocaust theology of hester panim, the essay reframes concealment as not merely a metaphysical condition but an ethical imperative. Building on prior work in hermeneutic medicine and the tzimtzum model of therapeutic presence. The paper concludes that the clinical encounter—properly understood—constitutes a contracted space in which the fragile song of the mockingbird may be heard without being silenced. Implications are drawn for medical humanities, narrative ethics, and the phenomenology of clinical witness.