Francis Schaeffer, The Mark of the Christian:
…it is in the midst of a difference that we have our golden opportunity. When everything is going well and we are all standing around in a nice little circle, there is not much to be seen by the world. But when we come to the place where there is a real difference and we exhibit uncompromised principles but at the same time observable love, then there is something that the world can see, something they can use to judge that these really are Christians, and that Jesus has indeed been sent by the Father.
Words of Grace 