The Great Epic of the Bhārata dynasty 12.232.18

12.232.18

vidhūma iva dīptārcirāditya iva dīptimān |
vaidyuto'gnirivākāśe paśyatyātmānamātmanā |
sarvaṃ ca tatra sarvatra vyāpakatvācca dṛśyate || 18 ||

If even one of the five senses of a human being be kept unrestrained, all his wisdom may be seen to escape through it like water through an unstopped hole at the bottom of a leathern bag. The mind in the first instance should be sought to be restrained by the Yogin after the manner of a fisherman seeking at the outset to render that one among the fish powerless from which there is the greatest danger to his nets. Having first subdued the mind, the Yogin should then proceed to subdue his ears, then his eyes, then his tongue, and then his nose. Having restrained these, he should fix them on the mind. Then withdrawing the mind from all purposes, he should fix it on the knowledge. Indeed, having restrained the five senses, the Yati should fix them on the mind. When these the mind for their sixth become concentrated in the knowledge, and thus concentrated remain steady and untroubled, then Brahma becomes perceptible like a smokeless fire of blazing flames or the Sun of effulgent radiance. Indeed, one then beholds in oneself one's soul like lightning fire in the skies. Everything then appears in it and it appears in everything in consequence of its infinitude. Those high-souled Brahmanas that are possessed of wisdom, that are endued with fortitude, that are possessed of high knowledge, and that are engaged in the good of all creatures, succeed in beholding it.