स्वर्गे लोके न भयं किंचनास्ति न तत्र त्वं न जरया बिभेति ।
उभे तीर्त्वाशनायापिपासे शोकातिगो मोदते स्वर्गलोके ॥ १२ ॥

svarge loke na bhayaṃ kiṃcanāsti na tatra tvaṃ na jarayā bibheti |
ubhe tīrtvāśanāyāpipāse śokātigo modate svargaloke || 12 ||

12. (Nachiketas says) In heaven there is no fear. You are not there; nor there do they in old age fear. Having crossed both hunger and thirst, one in heaven rejoices being above grief.

Shankara’s Commentary:

Nachiketas said ‘In heaven there is no fear at all caused by disease, etc. Nor do you rule there of might.’ Therefore, none there, fears you, as men in this world do in old age; again, having subdued both hunger and thirst, one in heaven being free from all afflictions of the mind rejoices.