Contradiction occupies a peculiarly generative position within the depth-psychological corpus: it is not merely an error to be dissolved but a structural feature of reality that, when endured, yields insight unavailable to univocal thought. McGilchrist, drawing on Needleman and Heraclitean sources, argues that the contradiction itself is the reality in all its manifoldness, and that faithfulness to the contradiction — rather than its premature resolution — opens the knower to genuine knowledge. This stands in productive tension with Plato’s use of contradiction as a dialectical weapon, particularly in the Republic and Euthydemus, where contradiction in poetry and sophistry marks epistemological failure rather than ontological richness. Pascal, cited by McGilchrist, complicates both positions: contradiction is a poor criterion of truth, but neither is its absence a sign of truth. The Hellenistic logicians — Stoics and Skeptics — mobilize contradiction formally, as the test of valid inference and the mechanism of the Sorites paradox, while Havelock locates the ‘root error’ of the concrete mind precisely in its embrace of contradiction. What emerges across these voices is a spectrum: contradiction as cognitive pathology (Plato, Havelock), contradiction as logical operator (Stoics), and contradiction as ontological ground of dynamic polarity (McGilchrist, mystical traditions). The depth-psychological stakes are highest in the last register, where holding contradiction without collapse is the very discipline of psychological and philosophical maturity.