I just saw this and want to put it here so I'll always know where to find it. It is refering to photographic technique, but it applies to all creative outlets.
Photographic technique is no secret and – provided the interest is there – easily assimilated. But inspiration comes from the soul and when the Muse isn’t around even the best exposure meter is very little help. In their biographies, artists like Michelangelo, da Vinci and Bach said that their most valuable technique was their ability to inspire themselves. This is true of all artists; the moment there is something to say, there becomes a way to say it. - Ralph Gibson - from his book Déjà vu [cited in: Creative Camera December 1972, p. 401]