Sol niger dispels the nigredo curse because it is "blacker than black." As Stanton Marlan shows,[23] we may be blackened and yet enlightened. Sol niger - one name for the ultimate aim of the whole alchemical endeavor - blackens with "unassimilable" darkness. It feels to be an "intolerable image."[24] Yet it is an image of sol, an illuminating sun that may darken all day-world positivism, but not all insight. As negation of negation, the black sun ontologically eradicates the primordial dread of non-being, that unfullfillable abyss - or, the abyss becomes the unbounded ground of possibility. Negation conceived as theological evil, a stage in a dialectical process, or a Manichaean power gives a positive function to darkness, enhancing the seduction of black. We succumb to the reverse of solar optimism, and descend into a positivist negation revealed as "the horror, the horror," into pessimism, cynicism, despair, and suicide as a rationally valid answer to a nigredo view. But sol niger shines invisibly through every such negative coagulation. Darkness and translucence both, a true decapitation of the ordinary mind. Hence Philalethes can speak of "eternal death that gladdens the heart." This emancipation of the mind means more than thinking dark thoughts with a blackened brain or suffering the body's obstinate depressions. It means the incorporation of invisibility within all perceptions, never losing the dark eye or ignoring the soul's desire for shades and sorrows. Hades never far from brother Zeus. To be benighted is only the beginning; to be black, to see black - that's how the nigredo inescapably affects us. But, to see by means of black, to see the habitual as mystery, the apparent as ambiguous, shifts the concretistic fixities into metaphorical images.
— James Hillman
Hillman is drawing a distinction most readers will miss on first pass: there is a difference between being blackened, thinking dark thoughts, and seeing *by means of* black. The first two are still modes of the day-world — one is simply the day-world inverted, wearing darkness as a new positivity. Pessimism, cynicism, even suicide reasoned as a valid conclusion to suffering — these are still solar operations, logic still running on the same axle, only pointed down instead of up. The soul that says *if I acknowledge how bad it really is, I will finally be honest enough to stop suffering* has not left the solar register at all; it has just changed the sign on the equation.
Sol niger is something else. The black sun does not illuminate by adding light to darkness or by romanticizing the descent. It illuminates by making the habitual strange — by refusing to let the apparent settle into the obvious. What Hillman calls "the incorporation of invisibility within all perceptions" is an epistemological shift, not a mood. The concretistic fixity that says *this is what the situation is* loosens into *this is one of the images the situation is wearing.* Hades, as Hillman reads Heraclitus, is the invisible dimension already present in every visible thing. To see by means of black is to let that invisible dimension remain active in perception — not as despair, and not as hope, but as perpetual ambiguity that keeps the image alive.
James Hillman·Alchemical Psychology·2010