In Revelation 4 & 5 there are 2 reasons for worship:
In chapter 4--the Creator
In chapter 5--the Redeemer
CREATOR:
Thou art worthy, O Lord, to receive glory and honor and power: for thou hast created all things, and for thy pleasure they are and were created.
Revelation 4:11
REDEEMER:
And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;
Revelation 5:9
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The Sabbath was given as a literal rest day
to honor Him as Creator:
But the seventh day is the sabbath of the LORD thy God: in it thou shalt not do any work,...
For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.
Exodus 20:10,11
The Sabbath was also given as a reminder
to rest in the grace of our Redeemer:
But the seventh day is the sabbath of the LORD thy God: in it thou shalt not do any work,...And remember that thou wast a servant in the land of Egypt, and that the LORD thy God brought thee out thence through a mighty hand and by a stretched out arm: therefore the LORD thy God commanded thee to keep the sabbath day.
Deuteronomy 5:14,15
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Paul Summarizes the Point:
A literal 7th day Sabbath remains....
And God did rest the seventh day from all his works....
For if Jesus had given them rest, then would he not afterward have spoken of another day.
There remaineth therefore a rest to the people of God.
Hebrews 4:4,8,9
And a spiritual Sabbath rest in His grace.....
For he that is entered into his rest, he also hath ceased from his own works,
as God did from his.
Let us labour therefore to enter into that rest,
lest any man fall after the same example of unbelief.
Hebrews 4:10,11