You can keep nine commandments and worship the door knob, but when you include the fourth commandment you must worship the Creator.
Exodus 31:16-17: "Wherefore the children of Israel
shall keep the sabbath, to observe the sabbath throughout their generations, for a
perpetual covenant. It is a sign between me and the children of Israel for ever:
for in six days the LORD made heaven and earth, and on the seventh day he rested, and
was refreshed."
Ezekiel 20:12: "Moreover also I gave them my
sabbaths, to be a sign between me and them, that they might know that I am the Lord
that sanctify them."
Exodus 31:16: "Wherefore the children of Israel
shall keep the sabbath, to observe the sabbath throughout their generations,
for a perpetual covenant."
A covenant is a binding agreement between two parties, according to the dictionary, "theologically, the promises made by God to man, as recorded in the Bible."
Exodus 31:16: ". . . to observe the sabbath
throughout their generations, for a perpetual covenant."
Galatians 3:29: "And if ye be Christ's, then are
ye Abraham's seed, and heirs according to the promise."
Abraham's seed became the children of Israel. All the promises to ancient Israel are for the benefit of spiritual Israel today.
Exodus 20:8: "Remember the sabbath day, to keep it
holy."
Exodus 31:13-14: "Speak thou also unto the
children of Israel, saying, Verily my sabbaths ye shall keep: for it is a sign between
me and you throughout your generations; that ye may know that I am the LORD that doth
sanctify you. Ye shall keep the sabbath therefore; for it is holy unto you: . . ."
 [Further Study]
Leviticus 19:30 "Ye shall keep my sabbaths, and
reverence my sanctuary: I am the LORD."
Isaiah 56:2 "Blessed is the man that doeth this,
and the son of man that layeth hold on it; that keepeth the sabbath from polluting it,
and keepeth his hand from doing any evil."
How to keep the Sabbath holy is the subject of another lesson.
Isaiah 66:22-23: "For as the new heavens and the
new earth, which I will make, shall remain before me, saith the LORD, so shall your
seed and your name remain. And it shall come to pass, that from one new moon to
another, and from one sabbath to another, shall all flesh come to worship before
me, saith the LORD."
Revelation 22:14: "Blessed are they that keep his
commandmemts, that they may have right to the tree of life, and may enter in through
the gates into the city."
Proverbs 7:2-3: "Keeo my commandments, and live;
and my law as the apple of thine eye. Bind them upon thy fingers, write them upon the
table of thine heart."
 [Further Study]
Ecclesiastes 12:13 "Let us hear the conclusion of
the whole matter: Fear God, and keep his commandments: for this is the whole duty of
man."
Hebrews 2:1: "Therefore we ought to give the more
earnest heed to the things which we have heard, lest at any time we should let them
slip."
James 4:17: "Therefore to him that knoweth to do
good, and doeth it not, to him it is sin."
John 14:15: "lf ye love me, keep my commandments."