The most readily accessible expression of unconscious processes is undoubtedly dreams. The dream is, so to speak, a pure product of the unconscious. The alterations which the dream undergoes in the process of reaching con-sciousness, although undeniable, can be considered irrelevant, since they too derive from the unconscious and are not intentional distortions. Possible modifications of the original dream-image derive from a more superficial layer of the unconscious and therefore contain valuable mater-ial too. They are further fantasy-products following the general trend of the dream. The same applies to the subsequent images and ideas which frequently occur while dozing or rise up spontaneously on waking. Since the dream originates in sleep, it bears all the characteristics of an 'abaissement du niveau mental' (Janet), or of low energy-tension: logical discontinuity, fragmentary character, analogy formations, superficial associations of the verbal, clang, or visual type, condensations, irrational expressions, confusion, etc.
— Joan Chodorow
Jung borrows Janet's phrase — *abaissement du niveau mental*, lowering of the mental level — and what looks like a clinical observation is actually a claim about where depth hides. The very qualities that make a dream feel unreliable, its condensations, its non-sequiturs, its puns and clang-associations, are not static to be cleared away before meaning arrives. They are the meaning, or more precisely, they are the medium through which a layer of psyche that cannot organize itself into argument nonetheless manages to speak.
This has a consequence for how you sit with a dream image. The waking mind's first move is almost always taxonomic: it wants to identify the symbol, translate it, file it under the correct archetypal heading and move on. That move is itself an elevation of mental tension — a return to the level at which the dream was not produced. What Jung is pointing at here is that the *abaissement* is not a defect of dreaming but its condition of possibility. The loosened associations, the condensed figures, the visual rhymes that reason would never permit — these are how psyche speaks when the guard is down enough for it to speak at all. To tighten the material back into coherent narrative too quickly is to close the door just as it opened.
Joan Chodorow·Jung on Active Imagination·1997