CC Madhya 6.163
hena jīve ‘bheda’ kara īśvarera sane
“In the Bhagavad-gītā the living entity is established as the marginal potency of the Supreme Personality of Godhead. Yet you say that the living entity is completely different from the Lord.
The Brahma-sūtra states that according to the principle of śakti-śaktimator abhedaḥ, the living entity is simultaneously one with and different from the Supreme Personality of Godhead. Qualitatively the living entity and the Supreme Lord are one, but in quantity they are different. According to Śrī Caitanya Mahāprabhu’s philosophy of acintya-bhedābheda-tattva, the living entity and the Supreme Lord are accepted as one and different at the same time.