John 14:21,26
He that hath my commandments, and keeper them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
But the Comforter, which is the Holy Ghost, Whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
I believe those verses above still apply to us today. We have just as much of a promise today as the apostles , disciples did at the time of that utterance. So while I believe the written Scriptures are a gift I do not believe they are necessary to salvation. But that the man of God may be perfect, throughly furnished unto all good works.
Peter says" Knowing this first that no prophecy of the Scripture is of any private interpretation.
For the prophecy came not in old time by the will of man: but holy men of God spoke as they were moved by the Holy Spirit. " (Still possible today)
Revelation 14:12-13
Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.
And I heard a voice from heaven saying unto me, Write, Blessed are the dead which die in the Lord from henceforth: Yea, Smith the Spirit, that they may rest from their labors; and their works do follow them. ( underline that last section)
The Truth is that which is in agreement with The Almighty. The Truth is lived out daily in lives of people just as it was 2000 years ago. So who can say with authority that the Scriptures are finished.