God’s holy Word tells us that He made the heavens and earth and all that is in them out of nothing in six, twenty-four hour days.  This creation activity culminated in the making of man after God’s own image.  Everything lived in perfect harmony and God saw that it was very good!  And so the Lord rested on the seventh day and blessed it as a day of rest which was to be kept perpetually.  Cf. Exodus 20:8-11.