To perform this activity, it doesn't require much energy, much austerity. Simply you join the saṅkīrtana movement, and ecstasy you dance, take prasādam. By this process you are guaranteed you will never go to the hellish planet. So this saṅkīrtana movement is so nice. Anyway, don't disbelieve. It is in the śāstra. So there are hellish planet, hellish birth, 8,400,000 species of birth. So we have to take information from the śāstra. Don't be foolish. You create your mental concoction—no, that will not help you, because you are not free. Nobody is free. Everyone is under the grip of material laws. Even if I think, "I am free," that is my foolishness. I will be forced to act. Even if I do not want to become old man, I will be forced to become old man. And if I, after this giving up this body, if I . . . suppose nature is offering me a dog's body. If I say, "No, no, I will not accept this," no, you will be forced to accept it. That is nature's law. But you can save yourself if you follow conscientiously. That is Kṛṣṇa consciousness.
If you keep yourself in Kṛṣṇa consciousness and act accordingly, then you will be saved. Otherwise there is no saving. Tathā dehāntara-prāptiḥ (BG 2.13). You will have to accept another body.