Were some parts of the law cancelled or the whole law in its completeness should continue untill the heaven and the earth disappear?
Some parts of the New Testament clearly state that some portions of the law have been abolished with the death, resurrection and ascension of Christ (see examples in the end of this question). How does it go along with the following words of the Savior:
I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished (Matthew 5:18 AKJV)
Examples of some portions of the law that are pronounced as cancelled in the New Testament:
For in Christ Jesus neither circumcision avails any thing, nor uncircumcision, but a new creature (Gal. 6:15 AKJV)
7:11"If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need [was there then] that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron?
15[yet] there arises another Priest,
16who is made not after the law of a carnal commandment, but after the power of an endless life
18For there is verily a disannulling of the commandment going before for its weakness and unprofitableness.
19For the law made nothing perfect, but the bringing in of a better hope [did]; by which we draw nigh unto God
28For the law makes men high priests which have infirmity; but the word of the oath, which was since the law, [makes] the Son, who is consecrated for ever
8:6[He] has obtained a more excellent ministry, by how much also He is the mediator of a better covenant, which was established upon better promises.
7For if that first [covenant] had been faultless, then should no place have been sought for the second.
8For finding fault with them, he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah
13In that he saith, A new [covenant], he hath made the first old. Now that which decays and waxes old [is] ready to vanish away
10:1For the law having a shadow of good things to come, [and] not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
2For then would they not have ceased to be offered? because that the worshipers once purged should have had no more conscience of sins.
3But in those [sacrifices there is] a remembrance again [made] of sins every year.
4For [it is] not possible that the blood of bulls and of goats should take away sins
14by one offering He has perfected for ever them that are sanctified" (Heb. 7:11, 15-16, 18-19, 28, 8:6-8, 13, 10:1-4, 14 AKJV)