What unites the church is a common faith in Christ and a common share in the Spirit. Apart from this essential, Christians may have nothing at all in common. We differ from one another in temperament, personality, education, colour, culture, citizenship, language and in a host of other ways. Thank God we do. The church is a wonderfully inclusive fellowship, in which ‘there is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female’ (Gal. 3:28). In other words, in Christ we have equality.
–John R.W. Stott, Christ the Controversialist (London: Tyndale Press, 1970), p. 183.