"One of these innovators—perhaps the most stimulating to his contemporaries, though not the most successful in giving permanent form to his thoughts—was Thomas Hill Green. A sound instinct led him to a systematic, minute study of Hume; in his efforts to gain a sure footing he examined the works of the master of destructive criticism. Green did not construct a system, for one can scarcely term such his "Simplified Kantism"; at the end of his life he was groping in search of larger truths. But if an active, hopeful spirit in philosophy is abroad, he as much as anyone helped to bring it about. Far outside the realm of pure philosophy his influence extended; and many of those who have an idea of a life of "Christian citizenship"—those who hold fast to the doctrine that "only citizenship makes the moral man"—know not that they derive from him their creed."