http://www.hallvworthington.com/voicemain.html

The Word of God is living and powerful,
piercing even to the dividing asunder of soul and spirit, and of the joints and marrow,

and is a discerner and judge of the thoughts and intents of the heart.
Heb 4:12

I am He who searches the minds and hearts.

Rev 2:23

His name is the Word of God..on his thigh is a name written: King of Kings, and Lord of Lords.
Rev 19:13-16

Everyone who is of the Truth hears my voice.
John 18:37