Kaṭha Upaniṣad 29

29

naciketā uvāca -- svarge loke rogādinimittaṃ bhayaṃ kiñcana kiñcid api nāsti / na ca tatra tvaṃ mṛtyo sahasā prabhavasi, ato jarayā yukta iha lokavat tvatto na bibheti kaścit tatra / kiñcobha aśanāyāpipāse tīrtvātikramya śokam atītya gacchatīti śokātigaḥ san mānasena duḥkhena varjito modate hṛṣyati svargaloke divye ///1,1.12 //

Shankara’s Commentary:
Com. —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.