you cannot neglect that

Bob: But let us say, when I, in the town I live in I drink boiled water because some of the water has disease in it. Now, why should I drink boiled water? If I have been good enough not to get a disease, then I may drink any water. And if I have been not doing proper, then I shall get diseased...

Prabhupāda: So boiled water is any water also. Boiled water is included within any water.

Bob: But, you see, I drink that to prevent disease.

Prabhupāda: Yes. So long you are in the material world, what is physical laws, you cannot neglect that. Just like if you go to a jungle, there is tiger. It is known that it will attack you. Why should you voluntarily go and be attacked? It is not that a devotee should take physical risk so long he has got some physical body. It is not a challenge to the physical laws: "Oh, I have become a devotee. I challenge everything." That is foolishness. 

Anāsaktasya viṣayān yathārham upayuñjataḥ. Viṣaya, these physical necessities, the devotee is advised to accept the necessities of life without any attachment. Physical law is take the boiled water, but if boiled water is not available, does it mean he'll not drink water? If it is not available, you drink ordinary water. [break] We take Kṛṣṇa-prasādam. But while in touring, in hotels sometimes we have to take some food in the hotel. Does it mean, "Oh, I do not take any foodstuff from the hotel, I shall starve"? If I starve, then I'll be weak, I cannot preach. [break]

 Talk with Bob Cohen -- February 27-29, 1972, Māyāpura