Just for the sake of understanding, and since that passage is a definitive one for both Christianity and Messianism, I got to looking at all the terms Yeshua used in that passage. It is kind of an eye opener:
Mat 5:17 Think not that I am come to destroy (G2647) the law, (G3551) or the prophets: (G4396) I am not come to destroy, (G2647) but to fulfil. (G4137)
Mat 5:18 For verily I say (G3004) unto you, Till heaven and earth pass, one jot (G2503) or one tittle (G2762) shall in no wise pass from the law, (G3551) till all be fulfilled. (G1096)
Mat 5:19 Whosoever therefore shall break (G3089) one of these break (G3089) commandments, (G1785) and shall teach men so, he shall be called the least in the kingdom of heaven: (G3772) but whosoever shall do (G4160) and teach (G1321) them, the same shall be called great in the kingdom of heaven. (G3772)
Mat 5:20 For I say (G3004) unto you, That except your righteousness (G1343) shall exceed (G4052 ...) the righteousness of the scribes (G1122) and Pharisees, (G5330) ye shall in no case enter into the kingdom of heaven.
destroy (G2647) kataluō to loosen down (disintegrate), that is, (by implication) to demolish (literally or figuratively); ..., come to nought, overthrow, throw down.
So we are not to think Yeshua came to destroy or throw down the law, or to bring it to naught.
law (G3551) nomos ...; law (through the idea of prescriptive usage), generally (regulation), specifically (of Moses [including the volume]; also of the Gospel), or figuratively (a principle): - law.
Specifically He did not come to destroy the Law of Moshe.
prophets (G4396) prophētēs ... an inspired speaker; by extension a poet: - prophet.
The only prophets at the time Yeshua said this were Himself (to whom He did not appear to refer) and those of the "Old Testament," to wit, the TNK; a.k.a. Jewish guys who spoke with the authority of YHVH.
fulfil (G4137) plēroō ... (figuratively) to furnish (or imbue, diffuse, influence), satisfy, execute (an office), finish (a period or task), verify (or coincide with a prediction), ... accomplish, ..., (be) complete, end, expire, fill (up), fulfil, (be, make) full (come), fully preach, perfect, supply.
So Yeshua apparently came to fill an office which would make complete many of the things foretold by those Jewish guys (the ones with God's authority).
say (G3004) legō ...; properly to lay forth, that is, (figuratively) relate (in words [usually of systematic or set discourse; ...; by implication to mean: ..., put forth, say (-ing, on), shew, speak, tell, ...
And Yeshua liad this forth clearly for us to understand.
jot (G2503) iōta Of Hebrew origin (the tenth letter of the Hebrew alphabet); ..., put (figuratively) for a very small part of anything: - jot.
Ouch ... what part of the law are you resisting? A small mitzvah is still a mitzvah. And yes, I still have areas I need to work (a lot) on too; so no accusations here, just saying what is said.
tittle (G2762) keraia ...; something horn like, that is, (specifically) the apex of a Hebrew letter (figuratively the least particle): - tittle.
Not even one of those little marks on some letters can be removed. We'd say "obey it to the letter."
fulfilled. (G1096) ginomai ...; to cause to be (gen -erate), that is, (reflexively) to become (come into being), used with great latitude (literally, figuratively, intensively, etc.): - arise be assembled, be (come, -fall, -have self), be brought (to pass), (be) come (to pass), continue, be divided, be done, draw, be ended, fall, be finished, follow, be found, be fulfilled, ...
Caused to be, brought to pass, to come to pass? Sounds kina the opposite of wiping it out.
break (G3089) luō ...; to loosen (literally or figuratively): - break (up), destroy, dissolve, (un-) loose, melt, put off.
But we can destroy a/the law, bringing it to naught in our own lives and in others, simply by disobeying and teaching others to do the same. And why would anyone who claims the name of God want to bring what He said to naught? The simple answer is they are not who or what they claim to be.
commandments (G1785) entolē ...; injunction, that is, an authoritative prescription: - commandment, precept.
Back to something said with authority. The only commandments at the time this was said by Immanuel, God With Us, were those in the TNK; and in particular those in His .
heaven (G3772) ouranos ... (as the abode of God); by implication happiness, power, eternity; ...
Wow ... this is going to effect our eternity ... why then rush to agree with those who say "Oh, those don't apply to us. Let's just not do them 'cause we got grace anyhow"? Grace is for unintentional sin, or sin that takes us unawares (pretty girl walks by, I look, and I sin in my heart before I know it). And that only if we repent of it (still need to work on that ...). Grace does not cover willful, intentional sinnin'. So no, they don' got no grace. Not none.
do (G4160) poieō ...: - abide, + agree, appoint, ..., continue, ... without any delay, (would) do (-ing), execute, exercise, fulfil, gain, give, have, hold, X journeying, keep, ..., ordain, perform, ...
We will fulfill our own destiny by the things we continue to do here, now. Salvation is by grace, but actions still have consequences. And we still have free will; so while we are falling into more and more intentional sin, we are falling away from and out of the grace of Elohim. And we can do this to the point of walking away from our salvation and, like Shimshon after his haircut, God has left us and we don't even know it.
righteousness (G1343) dikaiosunē ...; equity (of character or act); specifically (Christian) justification: - righteousness.
Justification even in Christian theology is the doctrine that God vindicates only those who repent and believe in Jesus. Repent of what? "Sin" they'd say. And where is sin defined? In and later in the besorah of Yeshua- which in no way disagreed with but rather explained it more fully. I once told a minister that almost everything Yeshua said came straight from the mishna. "Welll I'd like to see that" was his emphatic response. Open the door of the henhouse when the fox is right there, why don't you pastor?
exceed (G4052 ...) perisseuō ...; to superabound (in quantity or quality), be in excess, be superfluous; also (transitively) to cause to superabound or excel: ... abundance, ..., be the better, ...
So we are to have righteousness in excess of even these religious Jews ... who are these super-Jews I have to out do in my walk? How can my halacha, and me raised a pagan and all, be better than theirs?
scribes (G1122) grammateus ...; a writer, that is, (professionally) scribe or secretary: - scribe, town-clerk.
Here both the Greek translator and the Christian theologians (including Mr. Strong) show their lack of understanding. True enough a scribe is a writer. But these were also lower officials in the synagogues and the Temple. They were the equivalent of lower primary school teachers. These were men educated to do more than just take dictation.
Pharisees, (G5330) Pharisaios ... Of Hebrew origin ...; a separatist, that is, exclusively religious; a Pharisaean, that is, Jewish sectary: - Pharisee.
And again they tell us what they did not know. The P'rushim (Pharises) were the largest sect in Yisro'el by far in the time of Yeshua. They were "the party of the people." Nowhere near "separatist" in relationship to the times, where Jews of many sects considered any other Jews to be tameh (ritually unclean) and would not associate with them. And the restrictions in place before joining some of these sects were stringent, to say the least. A P'rush just had to follow a P'rush Rabbi and believe the TNK and the Oral Tradition, and be a Jew, and they were members of the congregation. Rav Sha'ul (Paul) was a P'rush Rabbi, before and after his conversion. My knowledge has to be greater and my walk better than PUAL"S!? Say it isn't so!
It isn't, of course. I think Yeshua was speaking of the corrupt leaders in the P'rushim. And most were not, but in any large movement there will be some. And He was speaking of our heart condition vs. that of the corrupted leaders. I will never be able to keep like them boys did. And my teffilin are narrow (and I admit I don't use them most days) and my tzitzyoth are short (so I don't step on them when I stand up). They had and did all those things (but I bet they were pretty good at covering it up when they stepped on their tzitzit when standing ... it's embarrassing). But when I do use my teffilin, it gives me a sensual (touch) connection and focus to my prayers. And I do wear tzitzyoth always, though I tuck them in when it would offend (like when with my wife or if I enter a church). But I don't enter churches with idols any more. So I'm not as observant as even those corrupted leaders. An observant Jew would say I am sinning because I do not keep the mitzvoth as perfectly as they do. In fact, just because I do some things they do I've sinned in their eyes, So I'd tuck in my tzytzoth and try not to offend them if I knew one would be present. But I do not apologize for trying to keep the mitzvoth, even if it offends both Christianity an Judaism. God said it, I do it. And if I find value in the customs or traditions of either camp, I may adopt those in part or in whole.
And yes, sometimes I worry about what I do. I work out my salvation with a lot of fear and trembling, let me tell you! But my heart is to obey Hashem because He saved me out of a hateful, degenerate lifestyle. And it is true what it says, that those of us forgiven much tend to appreciate it more! I obey not for rewards here or even in the Olam Haba. The sins I piled onto Yeshua as He hung here giving Himself for me were a heavy burden to bear. I appreciate that, and want to please Him. And that is why I obey; and that is probably why Rav Sha'ul obeyed even after his conversion; and that, I think, is what Yeshua meant. God said it, and even though Rav Sha'ul said his flesh fought against it just like mine, we do our best to obey.
Dan C