Why do people say this? What will the devil work with if there is nothing there? If the devil is working, he is putting something there, if you go on thinking and thinking, how do you know where these thoughts have come from? If there is a true emptiness, nothing can be done with it. As soon as something is done, there is no longer an emptiness. Certainly, there will be some practice needed, mind will keep asserting and some will look evil - it is simply that now all you have repressed is arising. Do not become attached to it, simply watch, look at all the ridiculousness of it. Without being directed, this is what the mind has come up with, this is you without reins. Allow it to arise, it will cleanse your being, now you can be done with it. It is funny though that it is the religions which are based around choosing which say this. Choose good, deny evil, now without reins evil will fight back - you have to understand that without identifying with it, without giving it power, it is harmless, just an idea, a cloud floating through your inner sky. When mind is utterly empty, that is when spirituality is, that is when you see what you truly are. You cannot be deluded when mind is not, how will it happen? You cannot become depressed, afraid, mad, it is all an identification with your thoughts. All that is left is utter freedom, the vastness of truth, you are simply the whole because the very limitation of your being was a delusion all along.