What is the "Word of God"?
“THE WORD of God came to John,” the gospel says. In John’s case it was a prophetic word, but the “Word of God” has multiple meanings in Christian tradition.
Often people use “the Word” and “the Bible” interchangeably, but that’s too narrow a definition. While scripture is the inspired word of God, it’s not the only way God speaks. God spoke originally at Creation and these words became the world, Genesis tells us. John’s gospel also says that this divine word present at the beginning of the world was spoken into time in a new way in the person of Jesus: “And the Word became flesh and made his dwelling among us, and we saw his glory” (1:14).
The word is God’s self-revelation; it’s the means by which God communicates with us. The words of creation were “efficacious”: They take effect as soon as they’re uttered. The effect of the Word, however, depends on the freedom of the human will to accept or deny it. When God’s word acts upon material things, they move. When God’s word encounters the human person, he or she is free to remain unmoved and unchanged. As the psalmist says: If today you hear his voice, harden not your hearts! (Psalm 95:7-8).
Adapted from www.vocationnetwork.org/blog/questions_catholics_ask