Caitanya-caritāmṛta 6.10
se puruṣera aṁśa — advaita, nāhi kichu bheda śarīra-viśeṣa tāṅra — nāhika viccheda
[se purushera amsha — advaita, naahi kichu bheda shareera-vishesha taanra — naahika vichcheda]
Blended reading (Sanskrit + English inline)
se puruṣera aṁśa — advaita, nāhi kichu bheda śarīra-viśeṣa tāṅra — nāhika viccheda
Śrī Advaita Ācārya is a plenary part of that puruṣa and so is not different from Him. Indeed, Śrī Advaita Ācārya is not separate but is another form of that puruṣa.
My note
Source: vedabase.io