Siegfried Kracauer, "Photography"

"The meaning of memory images is linked to their truth content. So long as they are embedded in the uncontrolled life of the drives, they are inhabited by a demonic ambiguity; they are opaque, like frosted glass which scarcely a ray of light can penetrate. Their transparency increases to the extent that insights thin out the vegetation of the soul and limit the compulsion of nature. Truth can be found only by a liberated consciousness which assesses the demonic nature of the drives".