Sabbath Commandment

Some say that keeping the 7th day Sabbath is being legalistic or "trying to work your way to heaven". This, of course, is not true. For if it is-then if you have a chance to commit adultery-you might as well. Or your just trying to "work your way to heaven" also. Or why not lie if you feel like it? ---- Either you keep His commandments-or you don't. You can't pick 9 out of the 10 and replace one with another day, such as Sunday, just becasue you feel like it. For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all. For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law. James 2:10,11 Get the point?