The Fourth Commandment
Remember the Sabbath Day, to keep it holy. Six days shalt thou labour,  and do all thy work: but the seventh day is the Sabbath of the LORD thy  God: in it thou shalt not do any work, thou, nor thy son, nor thy  daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy  stranger that is within thy gates: for in six days the LORD made heaven  and Earth, the sea, and all that in them is, and rested the seventh day:  wherefore the LORD blessed the Sabbath Day, and hallowed it.
THERE HAS BEEN an awful letting-down in this country regarding the  Sabbath during the last twenty-five years, and many a man has been shorn  of spiritual power, like Samson, because he is not straight on this  question. 
Can you say that you observe the Sabbath properly? You may be a  professed Christian: are you obeying this commandment? Or do you  neglect the house of God on the Sabbath day, and spend your time  drinking and carousing in places of vice and crime, showing contempt for  God and His law? Are you ready to step into the scales? Where were you  last Sabbath? How did you spend it?
I honestly believe that this commandment is just as binding today as it  ever was. I have talked with men who have said that it has been  abrogated, but they have never been able to point to any place in the  Bible where God repealed it. When Christ was on earth, He did nothing to  set it aside; He freed it from the traces under which the scribes and  Pharisees had put it, and gave it its true place. 
"The Sabbath was made for man, and not man for the Sabbath." (Mark 2:27) 
It is 
just as practicable and as necessary for men today as it ever was-  in fact, more than ever, because we live in such an intense age.
The Sabbath was binding in Eden, and it has been in force ever since.  The fourth commandment begins with the word remember, showing that the  Sabbath already existed when God wrote this law on the tables of stone  at Sinai. How can men claim that this one commandment has been done away  with when they will admit that the other nine are still binding?
I believe that the Sabbath question today is a vital one for the whole  country. It is the burning question of the present time. If you give up  the Sabbath the church goes; if you give up the church the home goes;  and if the home goes the nation goes. That is the direction in which we  are traveling.
The church of God is losing its power on account of so many people giving up the Sabbath, and using it to promote selfishness.
http://www.fbinstitute.com/moody/The_TenCommandments_Text.html