The quote reflects a sense of disillusionment regarding a person's thoughts or plans. It conveys that while someone may have a notion, it lacks substance and depth. Describing the idea as a "white idea balloon" suggests it’s empty and unformed, indicating a disconnect between potential and reality.
This imagery signifies that not all ideas are well-developed or viable. The use of "wrong idea" underscores the importance of meaningful and fleshed-out concepts, implying that true understanding or creativity requires more than just a fleeting thought. This resonates with themes in Margaret Atwood's "The Robber Bride," where characters grapple with the complexity of their intentions and the outcomes they produce.