The mirror metaphor in James 1:23 suggests that if we honestly look into God's word, we should see the state of our godly deeds reflected. Our deeds should resemble the image God has for us, beginning with our begettal and nourishment (on scriptural food), our state as firstfruits - going through experiences or exercises (doing rather than hearing about it) qualifying us for responsibilities in His Kingdom, using God's word as our constant mirror. If we don't model our behavior after the high standards found throughout the Bible, we will be dreadfully deceived.