There are many sages who, in . . . during summer, they will burn fire all sides and meditate. There is already high temperature, 112 degrees in India. Sometimes 118 degree, and still they have fire all sides, all sides. Yes. And they are meditating, not disturbed. So this is called voluntarily tapa. And in winter season, when the temperature is forty degrees, fifty degrees—of course, not below zero—anyway, he goes to the water and dip into the water simply keeping the mouth up, and meditating. So there are some severe processes for tapasya. So this is one of the good qualities.
But in this age it is very difficult. To undergo such voluntary tribulations for realization, self-realization, meditation is not possible in this age. Therefore the Vedic injunction is that "You simply chant Hare Kṛṣṇa." Harer nāma harer nāma harer nāma eva kevalam (CC Adi 17.21). You don't have to take any botheration. In whatever position you are, you just try to consent in your mind to hear the sound "Hare Kṛṣṇa," best type of meditation, because it is not possible to acquire all these qualities, tapa.
So śamo-damas-tapa-śaucam. Śaucam means cleanliness, hygienic principle, to take bath thrice—at least once—daily. Therefore to keep no hair is better. You wash, there is no question of, I mean to say, moisture in the hair. And those who have got big hairs, they cannot take daily bath. But if you keep your bald-headed, there is no trouble. Śaucam. So bathing is required, taking bath daily, śaucam.
And kṣānti. Kṣānti means toleration. Because this world is full of miseries, and you have to execute Kṛṣṇa consciousness in this condition. Kṛṣṇa advised in the Bhagavad-gītā, Arjuna, that . . . because the topic was on the body, so Arjuna said: "Accepting that the soul is immortal and it never dies, still, if some relative dies, we feel pain. Is it not a fact?" Kṛṣṇa said: "Yes, it is a fact."
Even if I know that my son is dead, my son is not dead. The soul of my son is departed from this body to another body. So there is no cause of anxiety. He has got another body, but still, I feel, "Oh, my son . . ." for the body, because I am accustomed to love my son by the body. So this concession should be allowed. If somebody is crying, that does not mean he is a fool, but it is material affection.
So Kṛṣṇa advises that this kṣānti, titikṣa, toleration. How toleration? Śītoṣṇa-sukha-duḥkha-dāḥ. Just like we tolerate very severe cold. There is no use fighting and howling, "Oh, there is so much cold, so much cold, so much." You have to tolerate. You cannot fight.