Symbols have not one meaning only but several, and often they even characterize a pair of opposites… The correct interpretation depends on the context, i.e., the associations connected with the image, and on the actual condition of the dreamer's mind.
Jung argues that dream symbols are inherently polysemous and contextually determined, resisting any fixed interpretive key and requiring attention to the dreamer's individual psychological situation.
, The Undiscovered Self: With Symbols and the Interpretation of Dreams, 1957thesis