Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 63
Sanskrit:
एतावानेव मनुजैर्योगनैपुण्यबुद्धिभि: ।स्वार्थ: सर्वात्मना ज्ञेयो यत्परात्मैकदर्शनम् ॥ ६३ ॥
ITRANS:
etāvān eva manujairyoga-naipuṇya-buddhibhiḥsvārthaḥ sarvātmanā jñeyoyat parātmaika-darśanam
Translation:
Persons who try to reach the ultimate goal of life must expertly observe the Supreme Absolute Person and the living entity, who are one in quality in their relationship as part and whole. This is the ultimate understanding of life. There is no better truth than this.