Speculation leads you the wrong way. It allows you to put your emotions first, whereas investment gets emotions out of the picture.
John C. BogleThe general systems of money management today require people to pretend to do something they can't do and like something they don't. It's a funny business because on a net basis, the whole investment management business together gives no value added to all buyers combined. That's the way it has to work. Mutual funds charge two percent per year and then brokers switch people between funds, costing another three to four percentage points. The poor guy in the general public is getting a terrible product from the professionals.
John C. BogleIf you're very talented and keep winning, you'll do just fine. It may take a while. But the talent is hard to identify and talent is hard to tell from luck. There's an awful lot of luck in this business. Past performance is not helpful in judging future performance.
John C. Bogle