Allow me to adjust the emphasized word, and the verse takes on an entirely different meaning:
John 6:63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, ther are spirit, and they are life.
Now, that's just an academic exercise, since there is no emphasis on either the "word" or "spoken" in the Bible. But given that you are implying that the literal written words of God are Spirit and life, it does not explain why God would orchestrate life, passion, resurrection, and ascension of Christ, and then deprive the world of His "spirit" and "life" for more than 300 years when the Gospels were affirmed by the Church. Christ promised that the "helper" would come to the Apostles, and indeed He did! In tongues of fire on Pentecost Sunday! The Holy Spirit didn't commission the eleven apostles and Mary to get to work on the Gospels. He sent them out across the known world, preaching the Word of God as received directly by Christ and passed on to their successors (oral tradition). Most of the Apostles were uneducated and/or illiterate to begin with! In fact, the very people with access to holy scripture and the ability to read it were the very people condemned by Christ as a brood of vipers, while the poor, unwashed masses brought forth the pillars of the Church.
Tradition passed on from bishop to bishop, evangelizer to evangelizer was the modus operandi of the nascent Church. Kinko's didn't exist, and neither did the printing press. A bunch of poor, hungry fishermen were taught by example and told to "do" likewise, not write a thesis.
How did we get so far away from Mary?