Both Sigmund Freud and Carl Jung started from the premise that dreams reveal unconscious content the conscious mind cannot otherwise access. Jung was once considered close enough to Freud to be his heir apparent, but the two split around 1913 over a fundamental disagreement: what is a dream actually for?
In The Interpretation of Dreams (1900), Freud distinguished between Manifest Content (the dream story as remembered) and Latent Content (the true desire hidden behind it). He believed that desires censored and repressed during waking life — especially sexual and aggressive impulses — surface in distorted symbolic form once the mind's defenses relax during sleep.
From this view, the purpose of dream interpretation is to work backward and ask: what real desire is this dream concealing? For Freud, a dream points to something repressed in the past.
Jung believed dreams were not simply concealing past repression, but carrying a purposeful, forward-looking message from the unconscious in service of Individuation — the process of becoming a whole, integrated self. He described dreams as performing a 'Compensatory' function, correcting an imbalance in the conscious mind — for instance, an overly rational person might dream of being emotionally overwhelmed.
Jung also proposed that dreams draw on symbols shared across all of humanity — Archetypes — arising from the Collective Unconscious. The Shadow (the repressed, darker side of the self), the Anima/Animus (an inner image of the opposite gender), and the Wise Old Man are well-known examples.
For Freud, the question a dream poses is "what is this dream repressing?" — oriented toward the past. For Jung, it is "what is this dream asking of me?" — oriented toward the future. Freud emphasized sexual symbolism, while Jung emphasized that symbols carry personal meaning and was wary of any universal "dream dictionary."
Modern dream psychology rarely treats either theory as the final answer, often drawing on both alongside the neuroscientific finding that REM sleep reprocesses emotional memory. A dream that recurs, or carries intense emotion, is usually worth exploring for the real-life issue it might be pointing to.