And God said unto Moses, I AM THAT I AM:
Exodus 3:14
".....therefore, that about the Sabbath by which he who
hallows it may know, not only that the Lord is God, but that the Lord is
his God.
But to know God is to know not only that He is, but also what He is,
for His name is not simply “I AM,” but “I AM THAT I AM,”—I am what I am,
I am that which I am,—so that “he that comes to God must believe that
He is, and that He is a rewarder of them that diligently seek Him,”—must
believe not only that He is, but also what He is.
Therefore as the Sabbath is a sign which God has set, by which those who hallow it may know that He is the Lord their God; it follows with perfect certainty that there is in the Sabbath that by which those who hallow it may find the knowledge of God." A.T. Jones