"As a neo-Kantian, Windelband recognized that the limits of pure reason (directed at the natural world) espoused by Kant could not support science's epistemology and that other element, 'value', not only defined knowledge (its basis and application), but also conferred a necessary telos for reason's direction in the pursuit of any epistemological enterprise."
Albert Tauber Freud - The Reluctant Philosopher (2010) p.105-6