Madhudviṣa: "O son of Kuntī, the nonpermanent appearance of heat and cold, happiness and distress, and their disappearance in due course are like the appearance of winter and summer season. They arise from sense perception, O scion of Bharata, and one must learn to tolerate them without being disturbed."
Prabhupāda: Now the question is, "Yes, I understand that my grandfather is spirit soul and this body is material. Still, by nature I'll be unhappy if my grandfather is killed and my teacher is killed. I'll be unhappy." So Kṛṣṇa is instructing Arjuna that this kind of unhappiness, distress, is this world. You cannot avoid it. These are necessary distresses. The example He's giving that severe cold. In the winter season, in the month of January or some month, the winter is very severe, intolerable. Sometimes somewhere it is below 30 degrees zero. But what is to be done? The people in such part of the world who live... Just like in Canada it goes sometimes 30 degrees below zero. Does it mean that they'll close their offices and work and everything? No. Everything is going on as usual. One has to tolerate. That's all. In India also, in India and other parts of the eastern countries. Just like Arabia, Iraq or... During summertime, the temperature is 135. You cannot imagine 135. In India we have experienced temperature, I have experienced up to 118 degrees. Not always, unusually. But 110 degree is usual during summertime, 110 degree. Usual temperature. So does it mean... The scorching heat, you cannot get out on the street. But still, one has to go to office, one has to go to work. There are some cases of heat stroke. Still, nobody can stop his duty.