"Courage, not cleverness; not even inspiration, is the grain of mustard that grows up to be a great tree."

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It is hard to write a simple definition of something as varied as hacking, but I think what these activities have in common is playfulness, cleverness, and exploration. Thus, hacking means exploring the limits of what is possible, in a spirit of playful cleverness. Activities that display playful cleverness have "hack value".

— Richard Stallman