Be Diligent - to enter the Rest. Use the Sword...

11 Let us therefore be diligent to enter that rest, lest anyone fall according to the same example of disobedience.12 For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart.

13 And there is no creature hidden from His sight, but all things are naked and open to the eyes of Him to whom we must give account.

Hebrews 4:11-13