The writer of the book of Hebrews says concerning the Word of God:
Hebrews 4:12 For the word of God is quick [living and active], and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
What is the Word of God that is so powerful? Is it the Bible?