When Arjuna inquired from Kṛṣṇa that "Whatever You are saying, it is all right. Still, we sometimes feel pains and pleasures," so Kṛṣṇa answered:
- mātrā-sparśās tu kaunteya
- śītoṣṇa-sukha-duḥkha-dāḥ
- āgamāpāyino 'nityās
- tāṁs titikṣasva bhārata
- (BG 2.14)
Mātrā-sparśāḥ. "It is due to the skin. The skin." It is sometimes comfortable or uncomfortable according to the atmosphere. Just like we feel cold during winter season. We do not like to take bath. It is very cold. And again, in the summer season, we feel very warm, we want to enjoy taking bath. Therefore the water, the water, in some season it is comfortable; in some season it is uncomfortable. The water is what actually? A chemical. But the atmosphere makes it comfortable and uncomfortable.
But that comfortableness or uncomfortableness is not permanent, that the summer season does not continue permanently, neither the winter season continue permanently. It comes and goes. So there are so many things, they come and go. And being attached to so many things, I become comfortable or uncomfortable. Therefore Arjuna was advised that tāṁs titikṣasva bhārata. This material world is like that. Pains and pleasure, they come and go. They stay for some time but again go away. But we cannot give up our duty. That is not possible.