The point is, what IS the word of God. You believe it is the Bible that the catholics created and followed. Marcion created a Bible before that. The catholics killed those of Marcion AND Valentinus to excel their Bible over their opponents. What belief gave the catholics the right to murder in the name of God? The OT. The same god Jesus said the Jews were following.
John:
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
The Gospel is the word from the true God, spoken by his son. The OT isn't, unless you follow the catholic ideology, which fruits are obvious. The church (today) is a creation of the flesh, for the flesh. The word of God is spirit.
John 6:
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
Jesus spoke the word of (the true) God which is Gospel. A Christian seeks the Chrism that made Jesus the Christ. The OT never had it and the catholics confused it by trying to add the flesh to it (for their own purpose).
The word of God (gospel) is a seed. Nothing more. What you use to make it grow, is more important than the seed itself. It defines the fruits it produces. This was the reason we were given the Holy Spirit. Something the OT didn't have as well, and those people died.