The quote from P.G. Wodehouse's "The Girl on the Boat" suggests that when a woman possesses complete knowledge or insight, it often leads to complications for the man who is associated with her. This implies a sense of foreboding or the expectation of impending challenges when the woman is fully aware of her circumstances or the truth around her.

This idea reflects traditional gender dynamics where a woman's intelligence or awareness can create tension in relationships with men. It emphasizes the notion that knowledge can be a double-edged sword, both empowering for the woman and potentially disruptive for the man who may feel threatened or uncomfortable by her understanding.