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
Nothing Cuts and penetrates like the truth of God. (He is the Rock,His Work is perfect; For all His ways are justice; Righteous and upright is He. -Deut. 32:4)
Nobody knows you like God. The Bible knows how to pick us up and comfort us and build us up. But when we are up elevated by pride or human wisdom- the Bible knows how to bring us down by uncovering our sin, unmasking our hypocrisy, and demolishing our willfulness.