“Writing is nature's way of letting you know how sloppy your thinking is.”
—Richard Guindon (cartoon), San Francisco Chronicle, 1989 January
“Mathematics is nature's way of letting you know how sloppy your writing is.”
—Leslie Lamport, Specifying Systems, page 2, 2002 July 19
To think you have to write.
If you're thinking without writing, you only think you're thinking.