If you aren't hearing your inner voice, it could mean you're overburdened or not stimulated enough, or that you've learned to shut it off because the people around you have refused to engage it. Perhaps you've had a hardening of the arteries around your soul. I believe the choices we make in our lives and the people and places surrounding us increase the volume of our inner voice, decrease it, or annihilate it entirely.
If You Have to Cry, Go Outside: And Other Things Your Mother Never Told You (ed. Harper Collins, 2010) - ISBN: 9780061986222