God is faithful, by whom you were called unto the fellowship of his Son Jesus Christ our Lord.
All Commentaries on 1 Corinthians 1:9 Go To 1 Corinthians 1
John Chrysostom
AD 407
Paul says this so that the Corinthians will not fall into despair when he criticizes them. He reminds them that God is not the problem. We are, because of our sin and unbelief.