…If a devotee at all wants to cleanse his heart, he must chant and hear the glories of the Lord, Śrī Kṛṣṇa (śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ). This is a simple process. Kṛṣṇa Himself will help cleanse the heart because He is already seated there. Kṛṣṇa wants to continue living within the heart, and the Lord wants to give directions, but one has to keep his heart as clean as Lord Caitanya Mahāprabhu kept the Guṇḍicā temple. The devotee therefore has to cleanse his heart just as the Lord cleansed the Guṇḍicā temple. In this way one can be pacified and enriched in devotional service.
The Hare Krishna Movement 