RE: If you don't find a way to make money while you sleep, you will work until you die.

Yes you made sense. Work here is discussed in context of a day job, that pins people down to a routine and life of modern slavery. Writing is one of those passive income in a sense. For example, if you do printed works, it continues generating recurring income years after the initial effort. Thats the kind of work people should do and have time for friends and family, instead of doing 9-5.