Can that which is seeing be seen? Can that which is hearing be heard? Can that which is feeling be felt?
Allow your attention to rest not on thoughts, but on the empty, changeless, shapeless, colorless space all thoughts appear in. In other words, learn to discriminate between thoughts and that which is aware of thoughts. One moves, comes and goes, the other does not. You are not a thought. You are prior to any thought and this has always been the case.