Peter, like Paul, did not query the existence of slavery in the Roman empire; there was no possibility of such an entrenched and widespread system being changed at that period of human history. But both Peter and Paul (Galatians 2:28-29, Philemon v.l5-16) are concerned that a Christian slave should witness to Jesus Christ by his behaviour and should be assured of his heavenly reward (2: 18~20). The Greek word translated 'servant' in 2: 18 is the word commonly used for a household slave. 2: 19-20 reflect the teaching of Jesus in Luke 6 :33 and Matthew 5:11-12.