Ashtavakra Gita 18.9 -

It is true that the mind is given to ceaseless thinking. This is so because every one wants and treats the mind to be so. Every day is full of activities and interactions, the mind inspires or instigates. But the same mind will change its habit, if only you strive for it. Inspire the mind to think of ‘I’, the sole witness of the whole universe. Its nature is Consciousness.

As witness, it contracts no change or constriction on any account whatever. Be it an entity, state, condition, knowledge or memory, Consciousness only witnesses it all. Whatever it witnesses is not a reality. It is an illusory display. Being so, Consciousness is the only reality present, all the rest being its own super-imposition on itself. What credibility can any thought or emotion have or claim? The Knower is fully conscious of this fact, and he is utterly indifferent to everything and all.

It makes no difference whether the mind thinks ‘I am this’, or ‘I am not this’. Both are mere ideas, effects of the ideation Consciousness gives rise to. Do imaginations like this have the least effect in Consciousness itself? Do dreams affect the sleeper and waker the least?

Consciousness has inscrutable power. Imagination is one of them. It is this power that displays thoughts, ideas and formulations, none of which affects it the least. In the Knower all differentiations naturally grow weak. He is silent, immersed in the bliss of Consciousness, whether his body remains active or restful.