Here they did not write the laws on the fringes but spiritually reminded them of the 10 commandments which are Gods words. Remember the woman with the issue of blood who says if only I can touch the hem of His garment I will be healed. Every word of God is a spirit John 6:633 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
Deuteronomy 6:7,8,9
And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up.
This is exactly what God expected all His followers to do in faith as we have accepted Jesus Christ by faith to do His will by His grace. Every word of God is a spirit which we must obey by His grace.
The above reference teaches us that the 10 Commandments and the feasts of God are to be diligently obeyed, taught when we sittest in our house. Or to the congregations of God, when we walkest by the way when we liest down when we risest up
Deuteronomy 6:8 King James Version (KJV)
8: And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes.
9: And thou shalt write them upon the posts of thy house, and on thy gates.
You can see here the utmost importance of the 10 commandments All these are to be done by faith and they are spiritual things. The accepting of Jesus Christ is by faith in what He said, and it is by His Grace as well The same goes to the frontlets or our foreheads: God wants His 10 commandments to be accepted in our thinking faculties, minds, and hearts that stand as signs or the mark of God on our foreheads or hands.
But Satan beguiled us like in the garden of Eden. Our thoughts and our actions work together by God’s grace in faith.
The same Satan worked through the Emperors and the Papacy of Rome to change the laws of God and His holy days as God predicted in the book of Daniel 7:25
25: And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until a time and times and the dividing of time.