Cherry picking passages and applying your own twist again? The passages you present are TRUE..........prophecy was still valid when Peter was declaring NEW DOCTRINE FROM HEAVEN.....it has nothing to do with new 20th century doctrine. Peter was writing scripture to be used as doctrine, and could prove his apostleship through signs and wonders. Something joe smith could not accomplish, nor can any supposed modern day apostle.
God speaks to us through His Son...i.e, Jesus Christ (Hebrews 1:1-2), Jesus Christ is THE WORD (John 1:1). We are to be "sanctified"......in Truth, What is Truth? Your WORD is TRUTH (John 17:17) THE WORD OF GOD is inspired by God, and is good for, Doctrine, Teaching, Correction, Rebuke.........in order to make the man of God Complete or Whole in working righteousness (2 Tim. 3:16-17)
If the scriptures can make the man of God, complete............what good is a supposed book of mormon? Either God in the form of the Holy Spirit lied..........or joe smith is lying and we need be more than COMPLETE, we need to be little gods in waiting. Oxymoron: contradictory terms. Something cannot be true and false at the same instant, according to the law of the excluded middle. One is truth, the other is a lie.
What part of Cor. 13:8-10)......did you fail to comprehend? "...............Love never fails. But where there are prophecies, they will fail; whether there are tongues (the gift of being able to translate foreign languages not ever learned, as demonstrated in acts 2) they will fail........whether there be knowledge (supernatural as the other gifts demonstrate in this list of gifts that will one day cease to exist), it (knowledge) will vanish away.
For We (the followers and disciples of Christ) know in part (there was no scriptures for the infant church to use as doctrine, (the law and prophets were nailed to the cross of Jesus), thus the use of the supernatural gifts to help establish doctrine for the N.T. church of Jesus Christ), and we prophecy in part (the church doctrine was not yet, at the time of Paul's writing, whole/complete/...i.e, Teleios in Greek....i.e, PERFECT:whole/completed). BUT WHEN THAT (THAT! not a he, but that....a thing,) which is PERFECT/TELEIOS) WHICH IS PERFECT COMES, THAT WHICH IS IN PART SHALL CEASE (propheceis will fail when the Word of God was completed just as James declared in 1:25 (Teleios, the same word used in 1 Cor.13),,,,,,,,,,,when the PERFECT LAW of LIBERATY was established in the 1st century) By the time the Book of James was recorded........the PERFECT LAW OF LIBERTY was in effect, the doctrine was complete, just as described by Jude 3...........once for all, the faith has been delivered by the saints (of the 1st century.....not the 20th century)
Its simple: You must worship in Spirit and in Truth (John 4:24). Your cult can't actually expect others to believe as TRUTH, a doctrine such as the supposed latter day saints propagate? Your modern day Apostles of Christ can raise the dead, heal the sick, the crippled, the blind........while not one time preforming these signs and wonders that accompany a truth Apostle of Christ in front of those they wish to convert in making known that your Apostles are speaking the Word of God confirmed by the signs and wonders? Even you can't TRUTHFULLY declare that you have witnessed any such SIGN OR WONDER of a true Apostle of Christ. (Mark 16:20, Hebrews 2:4)
SHOW ME THE SIGNS of a real prophet or apostle of Christ. Or don't because you can't.
That's why your cult fails when its SPIRIT of truth is placed to the test of the WORD revealed by Jesus Christ. There were no moon people dressed like quakers, Black Skinned people are not black because God is punishing them.............most importantly, God would not use an antiquated translation (mistakes of transmission and all) like the king James to present NEW DOCTRINE (God is not the author of confusion).......God would reveal new Scripture in the universal language of the day (American English).......in joe smith's circumstance, there would be no need to parrot passages of an existing translation and claim it as his own. What? joe smiths' god is not capable of revealing new text in modern English?
I will convert.........if you can demonstrate (IN TRUTH).......the signs and wonders preformed by a True Apostle of Christ. Demonstrate where your modern day apostles have lain hands on others and they now have a supernatural gift of the spirit (Just as recorded in Acts 8: 9-24). You will not because YOU are not Worshiping in Spirit and Truth.
This is not TESTING or tempting God............this is TESTING THE SPIRITS for false prophets as commanded in THE WORD (1 John 4:1-3) in comparison against the actual WORD of GOD which is the sword of the Spirit. (Eph. 6:17) YOUR CULT FAILS THE TEST OF THE SPIRIT OF GOD.

All one needs to do is SEARCH THE SCRIPTURES TO SEE IF THESE THINGS ARE SO...... (Acts 17:11)