For each doughnut I sell, somebody gives me money and I give them a tasty treat. They are happier because of our exchange, if only for a short while, and I know that I have "done some good" for that hungry person.
Now I could just as easily stay home and try to invent the uber-nut, a killer replacement for doughnuts that costs half as much as lasts twice as long. A treat that will change the snacking world as we know it! I can build a factory to make uber-nuts, I can design complicated equipment, I can go on the web and talk about how earth-shattering uber-nut is going to be.
But none of that sells any uber-nuts. It's just me spinning out an imaginary architecture and vision of world domination and using my skills to construct this fake world where it all is going to happen.
For every guy who makes an uber-nut and changes the world, there are thousands of failed attempts. For all of those attempts, most of them result in making the world no better at all. It's a long, bitter experience. As opposed to the guy who actually buys the doughnuts and goes and sells them, where he knows he is doing some small amount of good in the world. For every 20 or so guys just looking to make a difference, any difference, only one of them makes it happen.
Those are some amazing numbers, and you'd be a smart person to take some time and think about them.
What folks are saying is simple: Go make a difference. Right now. Some little, _real_ difference. Sell a doughnut. Find a small niche and improve people's lives in it. Because even if you do one tiny, unimaginative, boring thing that only helps one person in some really small way? You've actually done something. As opposed to imagining you are creating the next earth-shattering invention and then flaming out. Because even if you created the uber-nut that changes snacking as we know it? You're going to do that by making a box of uber-nuts and going down to that street corner and making one person happy at a time. You roll out huge changes by picking one small niche at a time. It's the same difference. The key question here is how much self-bullshitting you want to do versus how many doughnuts you want to sell.