Katha Upanishad - Verse 1.2.24
Text: नाविरतो दुश्चरितान्नाशान्तो नासमाहितः । नाशान्तमानसो वापि प्रज्ञानेनैनमाप्नुयात् ॥ २४ ॥ nāvirato duścaritānnāśānto nāsamāhitaḥ | nāśāntamānaso vāpi prajñānenainamāpnuyāt || 24 || 24. None who has not turned away from bad conducts whose senses are not under control, whose mind is not collected, or whose mind is not at rest, can attain this atman by knowledge. Shankara’s Commentary: Yet something more: who has not turned away from bad conduct, i.e., from sinful acts prohibited and not permitted by the srutis and the smritis, who has no quietude from the activity of the senses, whose mind is not concentrated, i....