Well, if you want the *nutshell* version-
Noah Webster, the man personally responsible for Art. I, Sec. 8, ¶ 8, of the U. S. Constitution, explained two centuries ago:
The duties of men are summarily comprised in the Ten Commandments, consisting of two tables; one comprehending the duties which we owe immediately to God-the other, the duties we owe to our fellow men.
The Ten Commandments are two sets of laws. Enforcement of the first 5 remains only in God's purview. The LAST 5 Commandments were laws between God and men AND punishable BY man. Breaking one of these 5 Commandments is what defines *crime* for ALL of the people.
These moral laws were already well known by Americans. When a person murdered (not to be confused with self defense), failed to live up to a contractual obligation (adultery), stole, lied, or conspired (covet) to do any of the above, that person committed a crime because they negatively and directly affected another human being.
If your interested in the fuller version, try:
Scroll down to the Liberty Library section
BTW If you try to take moral, Christian principles completely out of government, you've pulled 'the principals for which it stands' right out from under the Constitution.
'Cause it's not about God....it's about Freedom :)