Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 48
Sanskrit:
विद्यातप:प्राणनिरोधमैत्री-तीर्थाभिषेकव्रतदानजप्यै: ।नात्यन्तशुद्धिं लभतेऽन्तरात्मायथा हृदिस्थे भगवत्यनन्ते ॥ ४८ ॥
ITRANS:
vidyā-tapaḥ-prāṇa-nirodha-maitrī-tīrthābhiṣeka-vrata-dāna-japyaiḥnātyanta-śuddhiṁ labhate ’ntarātmāyathā hṛdi-sthe bhagavaty anante
Translation:
By one’s engaging in the processes of demigod worship, austerities, breath control, compassion, bathing in holy places, strict vows, charity and chanting of various mantras, one’s mind cannot attain the same absolute purification as that achieved when the unlimited Personality of Godhead appears within one’s heart.