What does it mean to be a “slave to righteousness”? Paul explains in Romans 6:18 that Christians are no longer slaves to sin and sin has power no longer. Instead, Christians are now slaves to righteousness. In this sermon on Romans 6:18 titled “Servants of Righteousness,” Dr. Martyn Lloyd-Jones details several truths that can be drawn from this one verse. He is clear to point out that he is not saying that there is no sin left in the Christian or that they are free from sinful nature or temptations. There is no choice in this matter of sanctification because it starts the moment that the Christian believes. Once they believe, the soul yearns with jealous envy for righteousness because they are drawn to the realm of God instead of the realm of sin. Dr. Lloyd-Jones also warns that many people can have qualities of a Christian but not hold the same doctrines. He mentions that the Pharisees were people like this, creating their own righteousness instead of submitting to God’s righteousness. This practice is ignorant. One does not understand what morality is and needs to lean on the Lord for wisdom. Christians can rejoice that the Lord who began a good work in them will be faithful to complete this work.

http://www.mljtrust.org/sermons/servants-of-righteousness/