Sense Gratification makes the body weak and reduces life span

Srila Prabhupada's Purport 4.27.24

(Narada Muni advises KalaKanya (Jara- old age) to marry the King of the Yavanas)

The words yavanānām ṛṣabham refer to the King of the Yavanas. The Sanskrit words yavana and mleccha apply to those who do not follow the Vedic principles. According to the Vedic principles, one should rise early in the morning, take bath, chant Hare Kṛṣṇa, offer maṅgala-ārati to the Deities, study Vedic literature, take prasāda and engage in dressing and decorating the Deities. One must also collect money for the temple expenditures, or if one is a householder he must go to work in accordance with the prescribed duties of a brāhmaṇa, kṣatriya, vaiśya orśūdra. In this way one should live a life of spiritual understanding, and this is the Vedic way of civilization. One who does not follow all these rules and regulations is called a yavana or mleccha. One should not mistakenly think that these words refer to certain classes of men in other countries. There is no question of limitation according to nationalism. Whether one lives in India or outside of India, he is called a yavana or mleccha if he does not follow the Vedic principles. One who does not actually follow the hygienic principles prescribed in the Vedic rules and regulations will be subjected to many contagious diseases. Because the students in this Kṛṣṇa consciousness movement are advised to follow the Vedic principles, they naturally become hygienic.

If a person is Kṛṣṇa conscious, he can work like a young man even if he is seventy-five or eighty years old. Thus the daughter of Kāla (Time) cannot overcome a Vaiṣṇava. Śrīla Kṛṣṇadāsa Kavirāja Gosvāmī engaged in writingCaitanya-caritāmṛta when he was very old, yet he presented the most wonderful literature about the activities of Lord Caitanya. Śrīla Rūpa Gosvāmī and Sanātana Gosvāmī began their spiritual lives at a very old age — that is, after they retired from their occupations and family lives — yet they presented many valuable literatures for the advancement of spiritual life.

.......

Because a devotee rigidly follows the instructions of Nārada Muni, he has no fear of old age, disease or death. Apparently a devotee may grow old, but he is not subjected to the symptoms of defeat experienced by a common man in old age. Consequently, old age does not make a devotee fearful of death, as a common man is fearful of death. When jarā, or old age, takes shelter of a devotee, Kālakanyā diminishes the devotee’s fear. A devotee knows that after death he is going back home, back to Godhead; therefore he has no fear of death. Thus instead of depressing a devotee, advanced age helps him become fearless and thus happy.

Srila Prabhupada's purport to 4.27.28
After much consideration, the King of the Yavanas decided to make the best use of a bad bargain. Kālakanyā was a bad bargain, and no one liked her, but everything can be used for the service of the Lord. Thus the King of the Yavanas tried to utilize her for some purpose. The purpose has already been explained — that is, Kālakanyā asjarā, the invalidity of old age, can be used to arouse a sense of fear in people so that they will prepare for the next life by engaging in Kṛṣṇa consciousness.


Foolish people accept unhappiness as happiness; therefore the King of the Yavanas decided to attack such foolish people imperceptibly by old age, disease, and ultimately death. Of course, after death there must be birth; therefore Yavana-rāja thought it wise to kill all the karmīs through the agency of Kālakanyā and thus try to make them aware that materialistic advancement is not actually advancement. Every living entity is a spiritual being, and consequently without spiritual advancement the human form of life is ruined.

Srila Prabhupada's purport to 4.27.30

Yavana-rāja’s brother was Prajvāra, and Kālakanyā was invalidity itself. Combined and strengthened by the soldiers of Yavana-rāja — namely nonhygienic conditions, illicit sex and ultimately a high degree of temperature to bring on death — they would be able to smash the materialistic way of life. In this connection it is significant that Nārada was immune to the attack of jarā, or invalidity. Similarly jarā,or the destructive force, cannot attack any follower of Nārada Muni or another pure Vaiṣṇava.

Srila Prabhupada's purport to 4.28.2
According to the Vedic system, before coming to such a stage one should leave home and take sannyāsa to preach the message of God for the duration of life. However, if one sits at home and is served by his beloved wife and children, he certainly becomes weaker and weaker due to sense gratification. When death finally comes, one leaves the body devoid of spiritual assets.