"For here have we no continuing city, but we seek one to come."
-- Hebrews 13:14
Christians are strangers and pilgrims in this world. We are "in" the world but not "of" the world and we live "between the times." We are citizens of the kingdom of God sojourning in a foreign land.
Christians should be conspicuous and peculiar in their manner of life. They neither think nor act like the men who are at home in this world. Men of the world think by a logic of equivalence. At best, men of the world live by rules, regulations and laws. Laws help us treat each other equally and fairly, but laws do not permit us to respect individual differences.
Christians think by a logic of superabundance. They live by faith. That faith is expressed by a pattern of life that allows us to respond to each other as individuals and persons. Christians live according to a standard that is higher than justice. We measure ourselves by Christ's love. That's why we can turn the other cheek, walk the second mile, give both our coat and our cloak, and forgive one another seventy times seven.