It is interesting that there are some who are giving themselves full credit for obeying the law, just because they love Christ. The Jews loved the Father God and obeyed the law, but it wasn't enough because of the presence of the sinful nature, which those same people have said we will always have, no matter what the gospel says of being born again as new creatures. There is no difference between themselves and the lawful Jews. And both give themselves all the credit. Such arrogance.
What they fail to understand, no matter how many times it is pointed out, is that we cannot fulfill the righteous requirements of the law in ourselves, no matter if we love the Father, or the Son. It is only through being born again of the SPIRIT, which is becoming dead to SIN - the real culprit. This is why Peter who loved Jesus denied Him three times! He didn't have the Spirit yet, though he loved Jesus with all his heart. The sin nature must die, and that is only done through the baptism of the Holy Spirit. Then we are no longer in the sinful flesh, but in the Spirit. We cannot give ourselves any credit at all, because righteousness is all done then through and by the Spirit, we have nothing to boast about. That is what is meant in Scripture about "not by (my) works," because it is all dependent on the Spirit working through us. "I can do all things through Christ, WHO STRENGTHENS ME." Without the Spirit, we have no strength, just ourselves.
But we first must have Him, the Spirit of Christ. If not, we don't belong to Christ no matter how much we love Him. 90% of the church is in this condition and going straight to hell. And how do we receive the Spirit of Christ? Through complete one-time repentance of the whole sin nature inherited from Adam's sin. We will know if our repentance is complete or only for today's sin, knowing full well we will sin again, and again tomorrow because we know we'll want to, and plan on repenting again - a vicious cycle. That is a person with no power of God in them. They are still full of darkness, but think they have a relationship with God, 1 John 1:6. As far as eternal assurance, they are lying to themselves, as there is no eternal assurance for them. But once the Spirit of God is in us, all desires take 180 degree about face immediately. With the new nature, we naturally do righteousness, for the sin nature is dead, where when under the law with the sin nature still in place, it was a tug of war, and the vicious cycle repeats itself. With the new nature that doesn't willfully sin, there is no need for the law showing us sin that isn't there, thus they are "not under the law."