9. So then, there is still awaiting a full and complete Sabbath-rest reserved for the [true] people of God;
10. For he who has once entered [God's] rest also has ceased from [the weariness and pain] of human labors, just as God rested from those labors peculiarly His own. [Gen. 2:2.]
11. Let us therefore be zealous and exert ourselves and strive diligently to enter that rest [of God, to know and experience it for ourselves], that no one may fall or perish by the same kind of unbelief and disobedience [into which those in the wilderness fell].
12. For the Word that God speaks is alive and full of power [making it active, operative, energizing, and effective]; it is sharper than any two-edged sword, penetrating to the dividing line of the breath of life (soul) and [the immortal] spirit, and of joints and marrow [of the deepest parts of our nature], exposing and sifting and analyzing and judging the very thoughts and purposes of the heart.