Christian are often heard speaking of 'non-christian.' For example: "Mr A is now a Christian but he comes from a non-Christian family"; "There are many millions of non-Christians in Asia"; "Marriage between Christian and non-Christian"; "Followers of the non-Christian religions"; "Pakistan is a non-Christian nation"; "Christian dialogue with non-Christians." (And there are even such expressions as non-Methodist, non Presbyterian, non Evangelical). Obviously this is a convenient distinction. We regard all those who differ from ourselves as nons. We look at humanity as a whole, and then classify all those who are not Christians under the heading "non-Christians." It is as comprehensive as the sweeping distinction between proletariat and bourgeois; free nations and the Communist world.