You know that you will be rewarded for any good things you do, whether you are slaves or free. (Ephesians 6:8 CEV)
The whole duty of man is to serve the Lord and to do His commands. He will measure us by this standard, according to His laws. His laws are holy, just, and good. If you know the laws but do not do them, you sin. If you neglect to obey one of the laws, you miss all. He looks at our hearts and not our outer features. All will be judged according to His law. The rewards are real peace and real life. The rich and the poor, the mighty and the weak, the masters and slaves—all are to face the final judgment.