Bhagavatapurana 8.12.5

8.12.5

ādyantāvasya yan madhyamidamanyadahaṃ bahiḥ /
yato 'vyayasya naitāni tat satyaṃ brahma cidbhavān //

5. Thou art the Truth, essentially consciousness and no other than Brahman, from which the beginning, end and middle states of the world proceed, and which being unchangeable, is not subject to those states, which is also this the visible Universe and also "Aham" (I), *i. e.*, the seer, which is the external thing, the object, and also the other, the subject, of experience.