I have no idea who David C Pack is or what he teaches but it doesn't matter if God is our Authority.
God wrote and God spoke His Ten Commandments, it is His personal Testimony written by the finger of God, Exo 31;18 which is the Holy Spirit. For me there is no greater Authority than He, even if its not the popular path to follow.
Exo 20:8 “Remember the Sabbath day, to keep it holy. 9 Six days you shall labor and do all your work, 10 but the seventh day
is the Sabbath of the Lord your God.
In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who
is within your gates. 11 For
in six days the Lord made the heavens and the earth, the sea, and all that
is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.
The weekly Sabbath is meant to be a blessing Isa 56:2 because man can‘t bless or sanctify themselves Isa 66:17 we need God and God connects the Sabbath to His Creation Exo 20:11 and connects His Sabbath to His re-creation or sanctification Eze 20:12 God said the Sabbath is on the seventh day Exo 20:10 its really a sign of our loyalty Eze 20:20
Jesus condemned those who keep their own law in lieu of obeying God’s commandments quoting directly from the Ten Commandments
Mat 15:3 He answered and said to them, “Why do you also transgress the commandment of God because of your tradition? 4 For God commanded, saying, ‘Honor your father and your mother’; and, ‘He who curses father or mother, let him be put to death.’ 5 But you say, ‘Whoever says to his father or mother, “Whatever profit you might have received from me
is a gift
to God”— 6 then he need not honor his father [
a]or mother.’ Thus you have made the [
b]commandment of God of no effect by your tradition. 7 Hypocrites! Well did Isaiah prophesy about you, saying:
8 ‘These people [
c]draw near to Me with their mouth,
And honor Me with
their lips,
But their heart is far from Me.
9 And in vain they worship Me,
Teaching
as doctrines the commandments of men.’ ”
Jesu said, If you love Me, keep My commandments John 14:15, the Sabbath was never a suggestion or part of multiple choices for God’s people, the Sabbath is a commandment of God,, both personally written and spoken by the God of the Universe. We keep through our faith, because we trust He knows what’s best for us. Exo 20:6 1 John 5:3