The Great Epic of the Bhārata dynasty 12.232.33

12.232.33

ajaṃ purāṇamajaraṃ sanātanaṃ yadindriyairupalabhate naro'calaḥ |
aṇoraṇīyo mahato mahattaraṃ tadātmanā paśyati yukta ātmavān || 33 ||

He that has subdued his mind beholds in his own self, by the aid of his own knowledge the Uncreate, Ancient, Undeteriorating, and Eternal Brahma,--That, viz., which can not be attained to except by fixed senses,--That which is subtiler than the most subtile, and grosser than the most gross, and which is Emancipation's self.'