So read Bhāgavatam. Pronounce the verses very nicely. Therefore we're repeating. You hear the records and try to repeat. Simply by chanting the mantra you'll be purified. Simply by chant... Even you do not understand a single word of it, simply if you chant, this vibration has got such power. Śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ puṇya-śravaṇa-kīrtanaḥ (SB 1.2.17). If you simply chant and vibrate this verse..., these verses, these ślokas, it is puṇya-śravaṇa-kīrtanaḥ.
Lecture at http://vanisource.org/wiki/730414_-_Lecture_SB_01.08.22_-_Los_Angeles
Lecture at http://vanisource.org/wiki/730414_-_Lecture_SB_01.08.22_-_Los_Angeles