If you neglectfully chant, still there is success, but it will take some time. And if you chant very carefully, following the rules and regulations, then your success in this life is guaranteed. If we do it properly, then it has got immense potency. Immense potency. Don’t think it is childish, it is formality. No. Just see here. Atha upasprsya salilam sandadhe tat samahitah. This is wanted. Samahita, completely in trance. This is the process. So these things are required, how to become samahita, samadhi-stha, in trance. If we take it as childish play, formality, then it will act, but it will take long time. But if you do it properly, you’ll be quickly successful. In one life you’ll be successful. You don’t require to wait. My Guru Maharaja used to say that although this process is guaranteed, but don’t wait for another life. Finish this business in this life.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 1.7.20-21 — September 17, 1976, Vrndavana