‘Every human society or community is by nature both introspective and unstable. It is introspective, because it is always more comfortable to be a club to which only “people like us” belong. And it is unstable because I in my pride will always want to be narrowing the definition of people “people like us” so that it becomes “people like me.” Human pride leads to human strife which divides a society from within; and human pride leads to dividing walls of hostility which cut us off from the world outside. The gospel therefore needs to counteract both internal instability and external defensiveness. And it does both in exactly the same way, by humbling human pride.’
Christopher Ash, Teaching Romans (Volume 1), p.35.