Answer this question. If Jesus says think not, or don't think. Are going against Jesus Word? Yes or No? If it is no, read Matthew 5:17-18
Jesus says here in Matthew 5:17-18 that this law(the Law of Moses) is in effect "till heaven and earth pass away" ...
But in Matthew 24:35 Jesus says "heaven and earth
will pass away but my words shall not pass away"
So you can set your hopes on this present earth or the one that is to come which is founded on something much more substantial. That is specifically that Jesus Christ Himself is the chief cornerstone and the "sure foundation" of a new heaven and a new earth. For all old things are passing away and vanishing. (Hebrews 8:13) And all things are made new in Jesus Christ. For heaven and earth will be burned up and the elements will melt when He returns.
So we consider the substance of our foundations. Jesus said "let the dead bury the dead" and so it is. And the angels asked "why do you seek for the living among the dead?"
And what is the "new Covenant"? It is this:
"Awake thou that sleepest, and arise from the dead, and Christ shall give thee light."
So Christians should consider themselves dead to this world. To this present heaven and this earth and they should consider themselves citizens (Ephesians 2:19) of the new Jerusalem and the new heaven and the new earth. For they are risen with Jesus Christ and sit in heavenly places with Him.
Because when Jesus rose from the dead that was when God laid that stone in Zion as He promised. "Behold, I lay in Zion for a foundation a stone, a tried stone, a precious corner stone, a sure foundation:"
God also said:
But be ye glad and rejoice for ever in that which I create: for, behold, I create Jerusalem a rejoicing, and her people a joy.
So He promised a day when He would make Jerusalem Himself and so it begins with the laying of that cornerstone: Jesus Christ.
And He promises to make all things new and so it begins in Jesus Christ. Who is firstborn from the dead. And the foundation of the new heaven and the new earth.
Revelation 21:5
And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.
So yes the words of Jesus Christ are faithful and true. As it is written purge out the "old leaven" for Christ our passover is already sacrificed for us! The supper is laid and He says "come and dine".