In the absolute platform there is no such difference, as in this relative world there is difference between the name and the person whose name we are chanting. As such, there is no difference between the holy name of God and God. And Caitanya Mahāprabhu says there is no hard and fast rules and regulations for this chanting.
So you can chant the holy name of God anywhere, everywhere, and wherever it is possible. So suppose you are walking on the street or passing on the buses, but if you chant the holy name of God, especially Hare Kṛṣṇa, Hare Kṛṣṇa, you will get much benefit without any loss of your money or without any hampering of your business.
We therefore request and recommend that so long we live, we may chant the holy name of God: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. We don't charge anything for giving you this name. It is open to everyone. You can take it and make an experiment. By chanting, you will feel how much you are advancing in spiritual knowledge.
This is the shortcut way of understanding God realization. But if you don't believe in the simple method, if you want to understand this philosophy through science and philosophy, we have got books, about one dozen books, four hundred pages each, to explain this science of chanting Hare Kṛṣṇa mantra. We have got our magazine, Back to Godhead, and our books, Kṛṣṇa book, Nectar of Devotion, Bhagavad-gītā, Śrīmad-Bhāgavatam. So many books we have got.
So those who are very much serious . . . and everyone should be serious, because if we miss this opportunity, then after death we do not know what is going to happen. I may have a human form of body or we may have a body of the animals or of a tree. That we do not know. But if we chant Hare Kṛṣṇa mantra and become advanced in Kṛṣṇa consciousness, at least next life again human form of body is guaranteed.