Through the centuries [people] have displayed many different symbols to show that they are Christians. They have worn crosses in the lapels of their coats, hung chains about their necks, even had special haircuts. Of course, there is nothing intrinsically wrong with any of this, if one feels it is [one’s] calling. But there is a much better sign, a universal mark that is to last through all the ages of the church until Jesus comes back. …
Love — and the unity it attests to — is the mark Christ gave Christians to wear before the world. Only with this mark may the world know that Christians are indeed Christians and that Jesus was sent by the Father.
—Francis Schaeffer
