I use the 10 commandments etc., as a ministry of condemnation and death for sinners to be driven by them to Christ.So, I am assuming that you are born again, and are concerned with sharing the gospel with the unsaved. How are you going to do this? Are you going to start with God loves everyone and wants to change their lives and make them happy, or are you going to show them whether they are good people or not on the basis of their compliance with the Ten Commandments.
God is going to judge us all on the basis of whether we keep the Ten Commandments or not. Those who are genuinely converted will be set free because Jesus has taken their penalty for sin on Himself.
But how is an unsaved person know that he is a sinner, and therefore not a good person and is in danger of the judgment unless you apply the Ten Commandments when you are showing him his sinfulness and what he needs to be saved from?
This is "sinner school".
If they graduate per Acts 2:38, they are qualified to leave sinner school and become led of the Spirit instead.
Only if folks are led of the Spirit, qualifies whether they are not under the Law per Gal 5:18.
This means, they are under the Law(including the 10) if not Spirit led.
Pre- New Testament Jews kept the 10 without the Holy Ghost.