"For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart."
In other words, the Gospel cuts.
The true, unadulterated, unbiased message of the story of Jesus cuts us to the heart. The Gospel can do its work. Our own wisdom cannot do this - the Gospel can.
When was the last time you spent a significant amount of time in the Gospel? When was the last time you dove into the Word?
Martin Luther said this about the Gospel:
"[It is] is alive, it speaks to me; it has feet, it runs after me; it has hands, it lays hold of me."
Sometimes we need to just get out of the Gospel's way and let it work.