The vision of the ignorant and deluded is involved in thought and imagination as well as their opposite, namely their own absence. For one resting in the Self, the thinkable and the thinking both become unreal.
The Sage wants to throw further light on the contrast between the vision of the ignorant and the wise. For, this is the best way to show how the two differ in their thoughts and assessments.
For the ignorant, whatever the mind thinks, feels and distorts causes immense concern, agitation and what not. For the Knower, the Self alone is, which he is. Anything else is an illusion. So, he has no cause for anxiety or anguish.
Everything only points the Self’s inscrutable power, as Krishna explains in Gita (9.4,5 ). The greatest illusion is the indescribable creation, which is not there at all, the Self displays. Krishna first states ‘all beings are in me, but I am not in them’, adding, ‘the beings are also not in me; see my divine yogic glory’. Is it not unambiguous that the whole creation, the senses in our body perceive and interact with, is actually not there! Like our dream, it is only an illusion the Self displays in itself!
So, the very thinker-thinking-thought distinctions the mind brings forth, are fictitious. That is why the mind wipes it off at the end of every day. Within unreality too, anything can be. Knower realizes this well. He is unconcerned with all that the mind thinks, feels and does. Imagine how glorious are the poise and freedom the Knower enjoys lavishly in himself!