Paul is describing what we would call now a days Carnal Christianity. Believers that call themselves Followers of Christ yet are the most negative and critical among the Body of Believers. They are the first to sow discord and dissension over insignificant details…and when they see good in others, rather than celebrating with them, they become envious and resentful…attempting to discount and even discredit the good work that was done. In Galatians 5:19-20, Paul illustrates acts of the sinful nature…and then goes on to list 15 examples…quite a list I must say…so no wonder he was chastising the Church in Corinth for its worldliness, he wanted them to move beyond their pettiness and selfish ambition.