Deaf, Dumb, and Blind by H. P. Lovecraft

A mysterious man, unable to see, hear, or speak, possesses strange knowledge that hints at hidden dimensions and horrifying truths. As others attempt to understand him, they discover that his silence may be the only thing protecting them from madness. The plot builds around unraveling his experience and the terror it implies. A dark story of isolation and unknowable horror. In silence lies a terrible secret too vast for words.