I'm convinced that there's a new way to define capitalism, and that the definition should include three ingredients - that we love our work, that we are building a traditionally successful business, and that we are having some positive impact in the world, whether it's local or global.

My personal view about how people should use Twitter is less relevant than our goal to provide the infrastructure for a new kind of communication and then support the creativity that emerges.

When I studied graphic design, I learned a valuable lesson: There's no perfect answer to the puzzle, and creativity is a renewable resource.