The Word of God judges the thoughts. The word judge means to critique, to be or act as a critic. This is to say that Scripture is able to accurately audit a person's life and size it up for what it is. The Word of God is able to examine the unseen attitudes and motivations, expose the secret ambitions and desires, and then render the divine verdict. Man looks on the outward appearance, but God looks upon the heart. This sharp, two-edged sword is able to penetrate into the hidden crevices of the heart and judge what only God can see. The Word makes known what we alone know about ourselves - and often what we do not yet know of ourselves. Scripture plunges deep into the unseen places of the human spirit and judges the private matters of the heart. Only the razor-sharp Word of God can do this.
~ Steven J. Lawson