The Self must be seen, must be heard, must be reflected u...

आत्मा वा अरे द्रष्टव्यः श्रोतव्यो मन्तव्यो निदिध्यासितव्यः। The Self must be seen, must be heard, must be reflected upon, and must be meditated upon continuously. One who has truly seen the Self knows everything, loses nothing. — Brihadaranyaka Upanishad 2.4.5