I believe our brain is our consciousness/"soul". There are one hundred billion nerve cells (give or take a few) and everyone is wired differently.
Here is a very good article which discusses this in depth and way better then I could.
In Praise of Self-Deception
So if we get down to physiology, if we are all wired differently then can one be wired better then another? Can rapists help raping, can psychopaths really control their urge to murder?
LunarEclipse.