Sometimes people hold a core belief that is very strong. When they are presented with evidence that works against that belief, the new evidence cannot be accepted. It would create a feeling that is extremely uncomfortable, called cognitive dissonance. And because it is so important to protect the core belief, they will rationalize, ignore and even deny anything that doesn’t fit in with the core belief.
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Once upon blotted-out time, the abject must have been a magnetized pole of covetousness. But the ashes of oblivion now serve as a screen and reflect aversion, repugnance. The clean and proper (in the sense of incorporated and incorporable) becomes filthy, the sought-after turns into the banished, fascination into shame. Then, forgotten time crops up suddenly and condenses into a flash of lightning an operation that, if it were thought out, would involve bringing together the two opposite terms but, on account of that flash, is discharged like thunder. The time of abjection is double: a time of oblivion and thunder, of veiled infinity and the moment when revelation bursts forth.
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Julia Kristeva | Powers of Horror: An Essay on Abjection