I know little of that faith but are you sure that is correct, as that makes no sense to me. Who would prefer nonexistence to existence?
Consciousness in this case is seen as a narrator. A part of your brain that keeps a running account of who you are and what you are about. It's an illusion of who you think you are and who you think you ought to be.
It tends to get in the way of just being. IOW it's not you. Everyone is afraid they would not exist without it. It keeps them trapped in an illusion of being something they are not.