Complete Works of Virginia Woolf: The Voyage Out
"You've cooked your goose!" said Helen brightly.
"We can't make you take us seriously, Mrs. Ambrose," he protested. "May I ask how you've spent your time? Reading - philosophy?" (He saw the black book.) "Metaphysics and fishing!" he exclaimed. "If I had to live again I believe I should devote myself to one or the other."
cook one's goose:
spoil someone's plans; cause someone's downfall
the branch of philosophy that deals with the nature of existence, truth and knowledge.