That may be what you take away from it. It may also have been Henry Ford's intent in say it. But that's not what it says, and if a quote needs an explanation to go along with it, it's not a good quote.

Plus, it's still false. Not everyone has the capacity to learn something and believing you're going to able to learn will not make you capable of learning it. I used to think everyone could just learn whatever they wanted... and then I started interviewing people for technical roles. Doesn't matter how much you believe and persevere. It doesn't make you capable.