If we are not under the law, does that mean the Ten Commandments are no good?
No. Being under grace rather than law does not cast aside the Ten Commandments as no good. They remain holy, perfect, and the mind of God. They serve as the criteria for social behavior for both Christian and non-Christian, and everything within them is for mankind's own good.
Les teaches that when he maintains we are not under the law, that does not mean we cast aside the Ten Commandments as no good. They are still holy, still perfect, and still the mind of God. They remain the criteria for social behavior, whether Christian or non-Christian. In fact, the Ten Commandments do not become a criteria of doctrine, which is why he has no compunction about having them in public schools, because they are not a religious doctrine. They are simply the mind of God, and everything within them is for mankind's own good.
For sin shall not have dominion over you: for ye are not under the law, but under grace.