"And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
My sheep hear my voice, and I know them, and they follow me:
Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me."
Apparently his allowing us to hear his voice is assurance of being of the elect.
How do you know that the voice you heard was "his voice"? Now it feels like I'm talking to a Mormon, not a Calvinist. Look how sola scriptura decays into pure gnosticism of the Benny Hinn sort.
-A8