yathaihikāmuṣmika-kāma-lampaṭaḥ
yathaihikāmuṣmika-kāma-lampaṭaḥ
suteṣu dāreṣu dhaneṣu cintayan |
śaṅketa vidvān kukalevarātyayād
yas tasya yatnaḥ śrama eva kevalam ||
(Śrīmad Bhāgavatam: 5.19.14)
“The endeavor of a learned person [i.e., the study of śāstra and practice of yoga of one] who fears the passing of the repulsive body, just like someone covetous of objects of enjoyment in the present and the afterlife who worries about his sons, wives, and possessions, is just mere labor [i.e., one’s study of śāstra and practice of yoga are fruitless unless one successfully fixes the mind on Bhagavān and gives up sāṁsārka attachment and thereby fear of death].”