I've never been sure why the Ten Commandments in particular, of all the law, are so treasured by Christians. Why, for example, is Sabbath observance a law that some Christians try to follow, but Sukkot observance is not? I do get that some of the Ten describe actions that Christians (like Jews) should not do -- we should not murder or steal or accuse each other falsely. Similarly, we should follow some of the principles in the broader Law, such as caring for the poor. But I don't know what makes people single out the Ten Commandments above the rest of the Torah to post on walls of buildings and so on.
I assume the practice started with earlier theologians. Someone with a better background in patristics than me: Did the church fathers single out the Ten Commandments in this way?
Matthew 28:20
teaching them to observe all that I commanded you; and lo, I am with you always, even to the end of the age."
John 15:14
"You are My friends if you do what I command you.
John 14:15
"If you love Me, you will keep My commandments.
John 14:21
"He who has My commandments and keeps them is the one who loves Me; and he who loves Me will be loved by My Father, and I will love him and will disclose Myself to him."
John 15:10
"If you keep My commandments, you will abide in My love; just as I have kept My Father's commandments and abide in His love.
1 John 2:3
By this we know that we have come to know Him, if we keep His commandments.
2 John 1:6
And this is love, that we walk according to His commandments This is the commandment, just as you have heard from the beginning, that you should walk in it.
John 8:51
"Truly, truly, I say to you, if anyone keeps My word he will never see death."
John 8:52
The Jews said to Him, "Now we know that You have a demon Abraham died, and the prophets also; and You say, 'If anyone keeps My word, he will never taste of death.'
1 John 2:4
The one who says, "I have come to know Him," and does not keep His commandments, is a liar, and the truth is not in him;
1 John 2:5
but whoever keeps His word, in him the love of God has truly been perfected By this we know that we are in Him:
The Sabbath is kept because of our love for Jesus.
Sukkot observance is not - this is not the 7th day Sabbath - It is the 7th day Sabbath in the 10 commandments ... the day God created for man and Jesus is Lord of it.
Matthew 12:8
For the Son of Man is Lord of the Sabbath.”
Mark 2:27
Then Jesus declared, “The Sabbath was made for man, not man for the Sabbath.