They came into the light of another street-lamp. Daniel took advantage of it to look at his companion's face, and gauge his mood. Leibniz looked a good deal more resolute than he had beneath the previous street-lamp. 'It is childish of me to expect older men to tell me what to do,' the Doctor said. 'No one told me to think about free will versus predestination. I plunged into the middle of the labyrinth, and became thoroughly lost, and then had no choice but to think my way out of it.'