Christians love those who hate them just as the soul loves the body and all its members despite the body's hatred. It is by the soul, enclosed within the body, that the body is held together, and similarly, it is by the Christians, detained in the world as in a prison, that the world is held together. The soul, though immortal, has a mortal dwelling place; and Christians also live for a time amidst perishable things, while awaiting the freedom from change and decay that will be theirs in heaven. As the soul benefits from the deprivation of food and drink, so Christians flourish under persecution. Such is the Christian’s lofty and divinely appointed function, from which he is not permitted to excuse himself.
From a letter to Diognetus