What we believe

The Sabbath day of the Lord JESUS CHRIST actually consists of three 'marks' or 'signs.' 1.) Creation  2.) Sanctification  3.) Redemption
 

Creation. The Lord Jesus blessed and sanctified that day at Eden [Genesis 2:1-3] before sin entered this earth and is therefore not Mosaic but was part of the Ten Commandments given to Moses [Exodus 20:8-12].

Sanctification. GOD says that the Seventh-day Sabbath is His sign of sanctification or holiness  "Morever also I gave them My Sabbath, to be a sign between Me and them, that they might know that I am the Lord that sanctify them."--Ezekiel 20:12.
Note that this Lord here is the Lord Jesus, the Lord of Lords and that He came to break down the middle wall of partition so that there is neither Jew nor Gentile and that we are now all one in the New Testament.

Redemption. Jesus re-creates a new heart in every born again Believer and asks us to be Lord of all or not Lord at all.

Jesus saves us from sin and not in sin.
 "And she will bring forth a Son, and you shall call His name JESUS, for He will
save His people from their sins." Matthew 1:21. This should be our first concern
and He has done it  in two ways: 1.) At the cross He paid the price for our sins
 and purchased our pardon. 2.) He gives us power to become the Sons and
Daughters of God now by inviting God through His Son Jesus Christ and His Holy
Spirit into our hearts and lives. "But as many as received Him, to them He gave the
 right to become children of God, to those who believe in His name: (13) who were
 born, not of blood, nor of the will of the flesh, nor of the will of man, but of God."
 John 1:12,13. 
And so we become born again Believers through the blood of Jesus and His power
 to save.

Now it remains to identify what sin is!
"For not the hearers of the law are just in the sight of God, but the doers of the law
 will be justified." Romans 2:13."Therefore by the deeds of the law no flesh will be
justified in His sight, for by the law is the knowledge of sin." Romans 3:20.
"Do we then make void the law through faith? Certainly not! On the contrary, we
 establish the law." Romans 3:31.
"What shall we say then? Is the law sin? Certainly not! On the contrary, I would
 not have known sin except through the law. For I would not have known
  covetousness unless the law had said, 'You shall not covet'." Romans 7:7.
"Whoever commits sin also commits lawlessness, and sin is lawlessness." 1 John 3:4.