Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 23

Sanskrit:

कथं विना रोमहर्षं द्रवता चेतसा विना ।विनानन्दाश्रुकलया शुध्येद् भक्त्या विनाशय: ॥ २३ ॥

ITRANS:

kathaṁ vinā roma-harṣaṁdravatā cetasā vināvinānandāśru-kalayāśudhyed bhaktyā vināśayaḥ

Translation:

If one’s hairs do not stand on end, how can the heart melt? And if the heart does not melt, how can tears of love flow from the eyes? If one does not cry in spiritual happiness, how can one render loving service to the Lord? And without such service, how can the consciousness be purified?

Purport:

Loving service to the Lord is the only process that can completely purify one’s consciousness; such service produces waves of ecstatic love that completely cleanse the soul. As mentioned earlier by Lord Kṛṣṇa to Śrī Uddhava, other processes such as self-control, pious activities, mystic yoga, penances, etc., certainly purify the mind, as stated in many authorized literatures. Such processes, however, do not completely remove the desire to perform forbidden activities. But pure devotional service rendered in love of Godhead is so powerful that it burns to ashes any obstacle encountered on the path of progress. The Lord has stated in this chapter that loving service to Him is a blazing fire that burns to ashes all impediments. In contrast, the small fires of mental speculation or mystic yoga can be extinguished by sinful desires at any moment. Thus, by hearing Śrīmad-Bhāgavatam one should ignite the blazing fire of loving service to the Lord and burn to ashes the network of material illusion.