Athāpi te deva padāmbuja-dvayaṁ prasāda-leśānugṛhīta eva hi, jānāti tattvaṁ na cānya eko 'pi ciram vicinvan (SB 10.14.29). Those who are favored by the causeless mercy of Kṛṣṇa, they can understand Kṛṣṇa. Others, na cānya eko 'pi ciram vicinvan. Ciram means for long time, for many years, if they speculate only what is God or what is Kṛṣṇa That process will not help us. There are many Vedic version like that:
- ataḥ śrī-kṛṣṇa-nāmādi
- na bhaved grāhyam indriyaiḥ
- sevonmukhe hi jihvādau
- svayam eva sphuraty adaḥ
- (CC Madhya 17.136)
Kṛṣṇa, His name, His fame, His attributes, His activities... Śrī-kṛṣṇa-nāmādi na bhaved... Nāmādi means "beginning from the holy name." So not possible... So if we keep ourself on the material platform, then for thousand years we may chant, it will be difficult. That is called nāmāparadha. Of course, holy name is so powerful that even by chanting with offense, gradually he becomes pure. Therefore we should not give up chanting. Any circumstances, we should go on chanting Hare Kṛṣṇa. But the warning is that if we keep us on the material platform, then it will be not possible to understand Kṛṣṇa, His holy name, His attribute, His form, His activities. It will not be possible.
So the process is bhakti. And when you come to the platform of understanding Kṛṣṇa, then immediately you become fit for being transferred to the spiritual world. That is... Kṛṣṇa said also in the Bhagavad-gītā, tyaktvā dehaṁ punar janma naiti mām eti (BG 4.9).