Who witnesses must believe that the Word of God
is powerful enough to reach the unbeliever.
For the word of God is quick (alive), 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.
You have God's guarantee that His Word will never return
void, but rather that it will prosper and accomplish God"s will.
No one who HOPES in the Lord will ever be put to shame.