Quote:
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 arenaked and open to the eyes of Him to whom we must give account.
You said only Jesus (the Word) knows man's heart, you are correct. What you failed to say or acknowledge is, Christ the Word, the Anointed is alive in His sheep. Not all the sheep in the fold are His sheep, there are some that don't hear His voice, they just follow the other sheep. The living Word gives light to all darkness, if it fails to shine then it's not light. We are the salt of the earth, if we loose our flavor, well?