The funny thing is, he makes billions of dollars while he sleeps and will still probably work until he dies. He loves his work that. The lesson from his quote is to build income streams that make money regardless of whether you work that day. If you get sick, take a vacation, get injured. Don’t settle for trading hours for income your whole life. It’s hard to become wealthy that way. You can use a combination of outsourcing and passive income streams to become more like Warren and make money while you sleep. And, of course, investments are a form of passive income.