I became insane, with long intervals of horrible sanity

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I became insane, with long intervals of horrible sanity.
Quote by Edgar Allan Poe.
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Edgar Allan Poe

January 18, 1809 – October 6, 1849
American writer, editor, and literary critic. Poe is best known for his poetry and short stories, particularly his tales of mystery and the macabre. He is widely regarded as a central figure of Romanticism in the United States and of American literature as a whole, and he was one of the country's earliest practitioners of the short story. He is generally considered the inventor of the detective fiction genre and is further credited with contributing to the emerging genre of science fiction.

One must be sane to think clearly

Thumbnail of Nikola Tesla
One must be sane to think clearly, but one can think deeply and be quite insane.
Quote by Nikola Tesla.
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Nikola Tesla

July 10, 1856 – January 7, 1943
Nikola Tesla (10 July 1856 – 7 January 1943) was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist who is best known for his contributions to the design of the modern alternating current (AC) electricity supply system.
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