This state is hard to describe because it’s a state that has no characteristics that you can use to identify it, other than the fact that it’s a state that has no characteristics you can use to identify it. But there is good news. If you have a good, solid seventh jhāna—a good, solid nothing—let it collapse and come to rest in front of your face. Then see if your mind will go into a state that has no characteristics (and yet, you can stay in that state). It’s very hard to describe, but it is fairly easy to find if you have sufficient concentration.