The best way of casting out an impure affection is to admit a pure one . . . It is only when, as in the gospel, acceptance is bestowed as a present, without money and without price, that the security which man feels in God is placed beyond the reach of disturbance. Only then can he repose in him as one friend reposes in another . . . The only way to dispossess the heart of an old affection is by the expulsive power of a new one.