This quote speaks for itself. I’m not sure who said it originally, but the Word of God is His voice speaking when you read it.
“In the beginning the Word already existed. The Word was with God, and the Word was God. God created everything through him, and nothing was created except through him. The Word gave life to everything that was created, and his life brought light to everyone. The light shines in the darkness, and the darkness can never extinguish it.” John 1:1, 3-5