Śatapatha Brāhmaṇa ("of a hundred paths") 2.2.2.17

2.2.2.17

antareṇāgādvyavṛtaditi | na ha vā asyaitaṃ kaścanāntareṇaiti yāvajjīvati yo 'syaiso 'ntarātmannagnirāhito bhavati tasmādu tannādriyeta yadanugacenna ha vā asyaiṣo 'nugacati yāvajjīvati yo 'syaiso 'ntarātmannagnirāhito bhavati

'It (or some one) might come between,--it might go away!' so (fear some); but, surely, as long as he lives no one comes between him and that fire which has been established in his innermost soul: let him, therefore, not heed this. And as to its becoming extinguished:--surely, as long as he lives, that fire which has been established in his innermost soul, does not become extinct in him.