Indeed it is. If the law was abolished, as some claim; why are they stressing the importance of grace?
Paul covers at least 8 different categories of law in his letter to the Romans (Leave it to a lawyer.)
The Law of Faith (Ch 3)
A Different Law (Ch 7)
The Law of My Mind (Ch 7)
The Law of Sin (Sin's Law) (Ch 7)
God's Law (Ch 7)
The Spirit's Law of Life (Ch 8)
The Law of Sin and Death (Ch 8)
The Law of Righteousness (Ch 9
Paul did not say that Yahshua set us free from YHWH's law.
That would contradict Yahshua plain simple language:
(CLV) Lk 16:17
Yet it is easier for heaven and earth to pass by than for one serif of the law to fall.
Paul did however say this, very early on in that letter:
(CLV) Ro 3:31
Are we, then, nullifying law through faith? May it not be coming to that! Nay, we are sustaining law.
How do we know if we love YHWH?
This is what YHWH said:
From the Decalogue
(CLV) Ex 20:6
yet showing benignity to thousands, to those loving Me and observing My instructions.
This is what his son said:
(CLV) Jn 14:15
If you should be loving Me, you will be keeping My precepts.
This is what one of his son's disciples said:
(CLV) 1Jn 5:3
For this is the love of God, that we may be keeping His precepts. And His precepts are not heavy,
The law was clearly known before it was written down for Moses; but that might be a topic for another thread.
I'll give one example here, which should be sufficient. Even the Heathen Abimelech knew that adultery was wrong.