Verses 12-17:
The first four "Words" or commands deal with man’s relationship to God. The last six "Words" or commands deal with man’s relationship to man.
The fifth "Word" imposes the obligation of respect for parents. This principle was honored throughout the ancient world, among pagans as well as God’s, people. A child who will not honor his parents will not honor God.
Disrespect for and disobedience toward parents was a capital crime under the Law, see De 21:18-21. While this is not true today, this principle still applies, Eph 6:1-3; Col 3:20.
This fifth "Word" is the first of all commandments with promise. The one who obeys it is promised long life.
The sixth "Word" is, "Thou shalt not kill." The Hebrew word is ratsach, meaning "to murder, pierce." Nine other words are translated "kill." The meanings vary: slay, put to death, slaughter, smite, wound. A literal translation of this text: "Thou shalt do no murder." It does not apply to the judicial sentence of execution for a capital crime.
The seventh "Word" prohibits immorality, sexual sins. "Adultery" naaph, refers to any act of a moral nature which violates the marriage covenant bond. See Mt 5:28; Ro 1:24; Eph 5:3; Pr 6:25, 26.
The eighth "Word" prohibits theft, the taking of that which belongs to another, by any means. It respects the individual’s right to hold personal property. See Mal 3:8; Pr 11:1; 16:8; 21:6; 22:16; Jer 17:11.
The ninth "Word" may be literally translated: ’ ’Thou shalt not answer against thy neighbor as a false witness, or a witness of falsehood." Compare with De 5:20 ("a witness of vanity). This shows that both untrue and unfounded statements against one’s neighbor are included in this commandment.
The tenth "Word" is a prohibition against a sin of the heart or will. It forbids all wrong, inordinate desires toward anything that belongs to someone else. In reality, this provision of the Law is the one most likely to awaken an awareness of sin, Ro 7:7. The other nine "Words" refer primarily to outward deeds, and these stem from the innermost thoughts and desires of the heart.