Hard work is good, but nobody ever became a billionaire through hard work alone. Hardworking people make money, while smart working people make wealth. Money is not sustainable. But wealth is sustainable, because it keeps on bringing more money. Aim for smart work. Because, while hard work is good, it however gradually destroys the body. That is why boxers don’t age well. Smart work on the other hand is not easy. But it is not laborious. Your brain does not drain like your body!