योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-41, verse-19

भविष्यन्नवनिर्माणं चेतसीव स्थितं पुरम् ।
ब्रह्म बृंहितभारूपमभेदीकृतमानसम् ॥ १९ ॥

bhaviṣyannavanirmāṇaṃ cetasīva sthitaṃ puram ,
brahma bṛṃhitabhārūpamabhedīkṛtamānasam 19

19. It is in esse and in posse to the minds of many, but to one who bears no duplicity in his mind, it appears as an extended reflection of the infinite mind of One.