"You know, it's a sad and unfortunate state of affairs that you have to live in a world where eight-year-olds refuse to believe in anything that they cannot touch or measure, and anyone who happens to see a thing that is invisible to most people is immediately branded a lunatic."

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A sure sign of failure for a startup is when someone sends me logo-embroidered polo shirts. If your people are at shows and in public, it's okay to buy for your own employees, but if you really think people are going to wear your branded polo when they're out and about, you are mistaken and have no idea how to spend your money.

— Mark Cuban