The word of God is living and powerful

For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart.—HEBREWS 4:12,  

Many people think of the Bible as a comforting book, but the Scripture claims to be a sword—alive, powerful, sharp. It cuts and penetrates way down into the depth of soul and spirit. It becomes a discerner of the thoughts and intents of the heart. Nothing cuts and penetrates like the truth of God. You could take all the psychology and philosophy in the world, and it cannot dismantle a man at the level of his soul as the Word of God can. And the reason is because nobody knows a man like God knows a man. The heart of every one of us is exposed to God, and the Bible reveals that penetrating insight into our souls. Yes, the Bible knows how to build us up, but it also knows how to convict and unmask our hypocrisy, how to cut into our pride and self-will, how to uncover our secret sins. But wherever God cuts, He heals, and whatever He reveals, He cleanses. And it’s that kind of cleansing that makes me able to bear more fruit to my own joy and to the glory of God.