Wherein you greatly rejoice, though now for a little while, if need be, you have been put to grief in various trials,

 There is a famous unwritten saying of Jesus: "The world is a bridge. The wise man will pass over it, but he will not build his house upon it." This is the thought which is behind the famous passage in The Epistle to Diognetus, one of the best-known works of the post-apostolic age: "Christians are not marked out from the rest of mankind by their country or their speech or their customs.... They dwell in cities both Greek and barbarian, each as his lot is cast, following the customs of the region in clothing and in food and in the outward things of life generally; yet they manifest the wonderful and openly paradoxical character of their own state. They inhabit the lands of their birth, but as temporary residents thereof; they take their share of all responsibilities as citizens, and endure all disabilities as aliens. Every foreign land is their native land, and every native land a foreign land.... They pass their days upon earth, but their citizenship is in heaven." 