That's interesting. "To keep thought from stopping" may refer to the many benefits of sleep, and perhaps supports the theory that we use dreams to sort extraneous information. Without dreams, we wouldn't be able to think coherently after a while.

The second part makes less sense... Unless between the second and third phrase you put "from." Then it could allude to REM rebound, which occurs after taking a depressant (alcohol) or through interrupted sleep.

You could've picked this information up off of the site easily, but maybe your mind discovered it on its own, and more fun text is on the way!