Would to Heaven we had never approached them at all, but had run back at top speed out of that blasphemous tunnel with the greasily smooth floors and the degenerate murals aping and mocking the things they had superseded-run back, before we had seen what we did see, and before our minds were burned with something which will never let us breathe easily again!
H.P. Lovecraft, At the Mountains of Madness
anguish, horror