The first half of Ephesians describes the origin of the church. The second half, including Ephesians 6, describes the conduct of believers.
Paul references the fifth commandment; these instructions are based on God's word. Paul uses the commandments to illustrate how Christians should live before God.
The law is a guide for living; salvation is by faith in Christ.
Pharisees' religious performance obscured God's radical message.
The law can on be followed by living the life in Christ, having received Him.