This chanting of Hare Kṛṣṇa mahā-mantra is possible by a person who is nivṛtta-tarṣa. Nivṛtta-tarṣa. Nivṛtta means finished. Brahmaṇy upaśamāśrayam. We have to finish this material business before we can understand spiritual thing. If one has got still inclination for material things, it is useless waste of time for him to understand, try to understand what is spiritual thing. So nivṛtta-tarṣair upagīyamānāt. Actually the holy name of Lord can be chanted by a person like Haridāsa Ṭhākura, who has no other desire, material desire. But those are not like Haridāsa Ṭhākura, they may take it. Bhavauṣadhi. If he chants, then gradually he'll be released from this material disease. For them, this is the chance. Actually it is meant for liberated person like Haridāsa Ṭhākura. Then why we are chanting? We are chanting—ceto-darpaṇa-mārjanam (CC Antya 20.12)—to cleanse our heart, to cure the material disease.
So it is actually relished by the liberated person, but those who are diseased like us, they can chant and gradually cure the material disease. This is the basic principle of chanting the holy name of Kṛṣṇa. Nivṛtta-tarṣair upagīyamānāt. Upagīyamāna, it is chanting. Why? Bhavauṣadhi. It is the medicine of this bhava-roga. What is that bhava-roga? Bhava-roga... Bhava means you pick up, means take your birth and again die. Bhūtvā bhūtvā pralīyate (BG 8.19). This is our disease. This is called saṁsāra. All these rascals in the material world, they are simply getting one body and again... Vāsāṁsi jīrṇāni yathā vihā... (BG 2.22). When it is useless, no more cannot be used, then you get another body according to the price you pay. Just like when your garment is old, you purchase another garment. So you can purchase very good garment or not very good garment, as you pay price. Similarly, to get a different type of garment or this body, you'll have to pay price. Price. If you are in higher status of consciousness, then ūrdhvaṁ gacchanti sattva-sthāḥ (BG 14.18): you get your body in the higher planetary system where the comforts are thousands and thousand times better than this.