Joseph Benson's Commentary of the Old and New Testaments - Hebrews 4:12
Hebrews 4:12. For the word of God As if he had said, Take heed of unbelief, for the word of God will try and condemn you if you be guilty of it. It is greatly debated among commentators whether this is to be understood of Christ, the eternal Word, or of the gospel. “None of the properties,” says Calmet, “mentioned here can be denied to the Son of God, the eternal Word. He sees all things, knows all things, penetrates all things, and can do all things. He is the Ruler of the heart, and can... read more
Albert Barnes' Notes on the Whole Bible - Hebrews 4:12
For the word of God - The design of this and the following verse is obvious. It is to show that we cannot escape the notice of God; that all insincerity, unbelief, hypocrisy, will be detected by him; and that since our hearts are perfectly open before him, we should be sincere and should not attempt to deceive him. The sense is, that the truth of God is all-penetrating and searching, and that the real thoughts and intents of the heart will be brought to light, and that if there is insincerity... read more