And in controversy they shall stand in judgment; and they shall judge it according to my judgments: and they shall keep my laws and my statutes in all mine assemblies; and they shall hallow my sabbaths. (Ezekiel 44:24)
No nation has ever prospered that has trampled the Sabbath in the dust. Show me a nation that has done this, and I will show you a nation that has got in it the seeds of ruin and decay.
I believe that Sabbath desecration will carry a nation down quicker than anything else. Adam brought marriage and the Sabbath with him out of Eden, and neither can be disregarded without suffering.
