There remains therefore a rest to the people of God. For he that is entered into his rest, he also has ceased from his own works, as God did from his. Let us labor therefore to enter into that rest, lest any man fall after the same example of unbelief. For the word of God is living, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart. Neither is there any creature that is not manifest in his sight: but all things are naked and opened unto the eyes of him with whom we have to do. (Hebrews 4:9-13)