6:19 I am speaking in human terms, because of your natural limitations. The illustration of slavery is an inadequate representation of the Christian life, especially in the Roman context, because it could convey harsh connotations of human slavery and inadequately express the truth that the yoke of Christ is easy (Matt. 11:28–30). Nevertheless, Paul retains the metaphor, perhaps believing that the greater danger is of failing to fulfill personal moral responsibility to the Lord.
leading to more lawlessness. Sinfulness does not stand still, but grows worse.