In 1984, science fiction titan Arthur C. Clarke delivered a story to Analog magazine called "siseneG" that he called the first he'd written in 10 years and said that they don't come much shorter. And in a handful of words, he wrestled with religion, computer science and the very fabric of reality.
If you can't make out the late Clarke's handwriting on the cover page to "siseneG," it reads:
This is the only short story I've written in ten years or so.
I think you'll agree that they don't come much shorter.
(Signed, 'Arthur C Clarke')
21 Mar 84
(Appearing in Analog, ? 1984)
© Arthur C Clarke 1984
(via Letters of Note)