"Whenever two religions are brought into contact, when members of each live together in peace, abstaining from all direct attempts at conversion, whether by force or by argument, though conscious all the time of the fact that they and their religion are on their trial, that they are being watched, that they are responsible for all they say and do—the effect has always been the greatest blessing to both. It calls out all the best elements in each, and at the same time keeps under all that is felt to be of doubtful value, of uncertain truth. Whenever this has happened in the history of the world, it has generally led either to the reform of both systems, or to the foundation of a new religion."