Doesn't seem to be all that complicated of an idea...You have the word of truth; the bible, divide it...
Not much different than you have a deck of cards and are told to divide it...
Matthew 5:
[17] Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
[18] For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
[19] Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
[20] For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
.
To think that Paul just suddenly changed the subject of his epistle, to throw in a verse out of nowhere, that completely contradicts everything he taught in every other epistle, is more than way out. .