The use of "fulfilling" and "fulfillment" doesn't change the sentiment - there is a law to be fulfilled by Christians and that is the Ten Commandments, which first four we will fulfill if we love God, and the last six we will fulfill if we love our neighbor. If we love God, we'll keep the first four, and if we love our neighbor, the last six.
Jesus said He didn't come to destroy the law, but fulfill, or "to keep" it, not do away with it. Otherwise, we distort Jesus' words into perhaps one of the most ridiculous statements there could ever by: "Think not I am come to destroy the law and the prophets: I am not come to destroy, but to do away with". Makes Jesus as confused as the most confused individual on the planet: a white Rastafarian.
Brother....Just adding to what you have written. Trying to make it as clear as we can make it.
The changing of the heart,
is, the fulfillment of the Law.
Through the Law, Jesus created a way to change our hearts, for those who obey his commands. This is why he said, He did not come to abolish the Law.
Now, if were were not under the Law.. Jesus would have said...I come to abolish the Law. But, did Jesus say that? No!
The Law of Christ is a New Covenant, not to be confused with the Law of Moses. But I can understand why it's confusing for many. Allow me to explain:
There were two parts of the Law God gave to Moses. Ten Laws of Omission written on stone...AKA the Ten Commandments, and over 600 laws of Commission....Laws which required WORKS.
Under the New Covenant, the 600 Laws of the Old Covenant were done away with, the Law of Moses.
But the Ten Commandments were not, they were carried over as a part of the New Covenant.
When Paul said "We are not under Law"......he was teaching against the Laws of Commission...AKA..Works, the Law of Moses. He was not teaching against keeping the Ten Commandments. To prove this to yourselves, try and find a passage, where Paul teaches against the Keeping of the Ten Commandments. This teaching does not exist.
Now.....try and find where he teaches against the 600 Laws of commission, and you will find him teaching against these Laws. Just read the book of Acts. This is what caused the dispute between Peter and Paul.
Many people, understandably, mistakenly call the Ten Commandments the Law of Moses. The Ten Commandments were in place, long before God ever wrote them in stone and gave them to Moses.
So this notion that we can Kill, lie, steal, commit adultery...etc, is just foolishness. Now I don't expect you to believe me, but think on this for a moment, THINK.....as to why most of us will be condemned.
In Revelation, you will see the condemned, are people who broke the Ten Commandments. Now honestly, if Jesus did away with the Ten Commandments, Why would God condemn the people who break them?