The inconsistency of genius is a consistent theme of creativity: Even those blessed with ridiculous talent still produce works of startling mediocrity.[…] The larger point is that mere imagination is not enough, for even those with prodigious gifts must still be able to sort their best from their worst, sifting through the clutter to find what’s actually worthwhile.
Jonah Lehrer, on How We Identify Good Ideas

Source: Wired