I felt an absolutely ...

I felt an absolutely indescribable sense of menace. It was hell on earth to be there [in the presence of the entities], and yet I couldn't move, couldn't cry out, couldn't get away. I'd lay as still as death, suffering inner agonies. Whatever was there seemed so monstrously ugly, so filthy and dark and sinister. Of course they were demons. They had to be. And they were here and I couldn't get away.
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 Whitley Strieber

Quotes from the same author

The upheavals of adolescence silenced 'A Christmas Carol' for a few years. I became a firebrand atheist. Christmas - humbug! Too commercial! Then I became an agnostic. Christmas was a pro-forma affair, basically a chore. Buy mother a book, dad a new tie, my brother and sister small gifts. Pretend thanks for the fountain pens and shirts I received.
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 Whitley Strieber
In them was not the savage blankness of the reptile species. Instead there was something far worse - burning, unquenchable rage mixed with the self-mocking irony of great intelligence.
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 Whitley Strieber