VerseD: Hebrews 4:12
For the word of God is living and effective and sharper than any double-edged sword, penetrating as far as the separation of soul and spirit, joints and marrow. It is able to judge the thoughts and intentions of the heart.
Hebrews 4:12, CSB
The gospel is God changing our hearts from the inside out by the blood of Christ, because He knows us better than we know ourselves from the inside out and reveals that through His Word.