Writing is a difference engine. It’s the difference between a blinking cursor and a word on the page. With each word, a different word suggests itself. The difference between 0 and 1, between nothing and something, is the engine of writing. To write something, you have to not write nothing.
The difference engine was the first computer, designed by Charles Babbage between 1822 and 1849. It was a good idea, but had to wait 153 years to be built.