(Meta-)quote: “Recent studies offer evidence that, contrary to popular belief, the main event of the imagination—creativity—does not require unrestrained freedom; rather, it relies on limits and obstacles.”
Another example: TED Talks, which are maximum 18 minutes
Here's a Forbes article on the subject: http://www.forbes.com/sites/carminegallo/2012/11/29/constrai...
(Meta-)quote: “Recent studies offer evidence that, contrary to popular belief, the main event of the imagination—creativity—does not require unrestrained freedom; rather, it relies on limits and obstacles.”
Another example: TED Talks, which are maximum 18 minutes