Art isn't only a painting. Art is anything that's creative, passionate, and personal. And great art resonates with the viewer, not only with the creator.
What makes someone an artist? I don't think is has anything to do with a paintbrush. There are painters who follow the numbers, or paint billboards, or work in a small village in China, painting reproductions. These folks, while swell people, aren't artists. On the other hand, Charlie Chaplin was an artist, beyond a doubt. So is Jonathan Ive, who designed the iPod. You can be an artists who works with oil paints or marble, sure. But there are artists who work with numbers, business models, and customer conversations. Art is about intent and communication, not substances.
An artists is someone who uses bravery, insight, creativity, and boldness to challenge the status quo. And an artists takes it personally.
That's why Bob Dylan is an artist, but an anonymous corporate hack who dreams up Pop 40 hits on the other side of the glass is merely a marketer. That's why Tony Hsieh, founder of Zappos, is an artists, while a boiler room of telemarketers is simply a scam.
Tom Peters, corporate gadfly and writer, is an artists, even though his readers are businesspeople. He's an artists because he takes a stand, he takes the work personally, and he doesn't care if someone disagrees. His art is part of him, and he feels compelled to share it with you because it's important, not because he expects you to pay him for it.
Art is a personal gift that changes the recipient. The medium doesn't matter. The intent does.
Art is a personal act of courage, something one human does that creates change in another.