Part II: Questions about The Ten Commandments
66. Q. Of what use are the ten commandments to us?
A. They teach us our duty, make clear our condemnation, and show us our need of a Saviour.
(Click through to read scriptural proof.)
Now we know that the law is good, if one uses it lawfully, understanding this, that the law is not laid down for the just but for the lawless and disobedient, for the ungodly and sinners, for the unholy and profane, for those who strike their fathers and mothers, for murderers, the sexually immoral, men who practice homosexuality, enslavers, liars, perjurers, and whatever else is contrary to sound doctrine, in accordance with the gospel of the glory of the blessed God with which I have been entrusted. (1 Timothy 1:8-11 ESV)
For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin.
So then, the law was our guardian until Christ came, in order that we might be justified by faith.
Scripture quoted from the English Standard Version.
Taken from A Catechism for Girls and Boys found here.