By way of a follow-up to last week's post on objective-setting and effectiveness, the engraving above is Plate 43 of Goya's Los Caprichos - The Sleep of Reason Produces Monsters. The text caption to the engraving read:
"Fantasy abandoned by reason produces impossible monsters: united with her, she is the mother of the arts and the origin of their marvels."
That seems to sum up perfectly everything about effective creativity.