|Madhya-līlā||Chapter 20: Lord Śrī Caitanya Mahāprabhu Instructs Sanātana Gosvāmī in the Science of the Absolute Truth|
Bhaktivedanta VedaBase: Śrī Caitanya Caritāmṛta Madhya 20.161
paramātmā yeńho, teńho kṛṣṇera eka aḿśa
ātmāra 'ātmā' haya kṛṣṇa sarva-avataḿsa
paramātmā — the Supersoul within the heart; yeńho — who; teńho — He; kṛṣṇera — of Lord Kṛṣṇa; eka — one; aḿśa — plenary portion; ātmāra — of the soul; ātmā — the soul; haya — is; kṛṣṇa — Lord Kṛṣṇa; sarva — of everything; avataḿsa — source.
"The Paramātmā, the Supersoul feature, is a plenary portion of the Supreme Personality of Godhead, who is the original soul of all living entities. Kṛṣṇa is the source of the Paramātmā.
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His Divine Grace A. C. Bhaktivedanta Swami Prabhupāda, Founder Ācārya of the International Society for Krishna Consciousness