Reading 1 at Mass from Hebrews 4: The word of God is living and effective, sharper than any two-edged sword, penetrating even between soul and spirit, joints and marrow, and able to discern reflections and thoughts of the heart. No creature is concealed from him, but everything is naked and exposed to the eyes of him to whom we must render an account. Paul uttered these words in union with God. For it is in union with the Lord that you gladly let his word (and his love) penetrate your heart to help you discern your inner thoughts and learn his ways. Such intimacy brings great joy to the soul.