योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-211, verse-14

जगदप्रतिघं सर्वं शान्तचिद्व्योम सर्वदा ।
यथा दृढं संविदितं तथैवाभाति नान्यथा ॥ १४ ॥

jagadapratighaṃ sarvaṃ śāntacidvyoma sarvadā ,
yathā dṛḍhaṃ saṃviditaṃ tathaivābhāti nānyathā 14

14. The world is altogether an unsubstantial and imperceptible thing;and is ever as silent and a serene void, as the vacuum of the intellect (or the Divine mind). It appears however as a solid and compact mass, according as the notion we have of it in our consciousness.