Modern day prophecies are discerned by the Holy Spirit. They must still be able to be backed by scripture and if anyone propheses anything different to what we've already been told we are told that they are false prophets. The thing about all the different people in the bible all being delusional etc, I don't find that to be true based on the fact that over 1000's of years without internet etc they were basically able to still write the same thing. The basics are all the same. They all speak of a coming Christ, being the one of God. They all speak of faith, the holy spirit all the same....they don't differ. They are not subject to 'chinese whispers' when it comes to the foundation of what they were saying to me it shows God work. The WAY they said it and the flourishes they may put in it are subject to man's personalities for sure. Also from what context they were writing, when how and why they were writing it and who they were writing to....all differ according to circumstances and the culture of the day. But the foundations of Christ, faith, God, the holy spirit, salvation etc etc are all the same. They flow well and can be referenced back 1000's of years without the people even knowing each other they were able to write with the same basic elemants intact. Some might even say that in the original hebrew and greek there is a pattern throughout that can only be possible through divine inspiration. Whether or not that's true, I don't really know or care.
Scripture to me, is the word of God. But Christ is the Word of God (capitals). There is only one Word and that is Christ....he is the Word and it is in him that I put my faith not necessarily in scripture, without the Word, scriptural word means nothing. Word of God is alive, it is spirit and it is written on the hearts of those who are born of the Spirit of God. It is deep within my core...cannot be shaken...will not move!