The earnestness with which the people of Christianity help one another in their need is incredible. They spare themselves nothing to this end. Apparently their first lawmaker has put it into their heads that all are somehow out to be regarded as brethren. Lucian of Samosata, 2nd century

Galatians 3: 28

There is no longer Jew or Greek, there is no longer slave or free, there is no longer male and female; for all of you are one in Christ Jesus...