You can only understand anything that matters – dreams, neurotic symptoms, people, literature – by over-interpreting it; by seeing it, from different aspects, as the product of multiple impulses. Over-interpretation, here, means not settling for a single interpretation, however apparently compelling. The implication – which hints at Freud’s ongoing suspicion, i.e. ambivalence, about psychoanalysis – is that the more persuasive, the more authoritative the interpretation the less credible it is, or should be. If one interpretation explained Hamlet we wouldn’t need Hamlet anymore: Hamletas a play would have been murdered. Over-interpretation means not being stopped in your tracks by what you are most persuaded by; to believe in a single interpretation is radically to misunderstand the object one is interpreting, and interpretation itself.
– From Against Self-Criticism by Adam Phillips in London Review of Books