Ideas without grounding cannot land anywhere. The image is precise: something that can rise and cannot stand, which is the state of a person full of vision who has not done the study that would let them start. Craft turns an intention into an object other people can use. It is also duller to acquire than having ideas, which is why the imbalance is so common.

If you have been generating concepts for a while without finishing anything, the missing ingredient is probably not more inspiration. Pick the least glamorous skill your idea requires and spend a month on it. Ambition tends to become believable at exactly that point.