If the Sabbath were not God's moral ordinance, then why did Jesus spend more time correcting the Pharisaical abuse of the Sabbath, more time correcting people's ideas and use of the 4th commandment than any other single commandment? He sure devoted a significant amount of his recorded teaching to addressing this commandment. If any wish to dismiss all that instruction, by asserting that the 4th is mere ceremony; if any wish to "dispensationalize" this aspect of Jesus moral instruction, at least face up to the reality. The argument for the moral requirement, particularly in the NT context, the proper use and purpose for the Day rests largely on the teaching of Jesus! It is a strong, exegetical argument.