I agree with the author when he says, "Fundamentally, you only need to know one thing: To build wealth, you must spend less than you earn." But there remains on

I agree with the author when he says, "Fundamentally, you only need to know one thing: To build wealth, you must spend less than you earn." But there remains one other thing. To build wealth, you'll have to keep your money somewhere. That somewhere is going to be some form of investment. Hence, to build wealth, you must make more on your investments than you lose. Now ask yourself: had I kept my money under the mattress instead of investing it, would I have more now, or would I have less? How much more or less? Funny thing is, most people don't know. This tool can tell you: greaterthanzero.com