Arise! Awake! Approach the great teachers and learn. The path is sharp as the edge of a razor, difficult to traverse — so say the wise.
Katha Upanishad
कठोपनिषद्
मूल श्लोकः
उत्तिष्ठत जाग्रत प्राप्य वरान्निबोधत। क्षुरस्य धारा निशिता दुरत्यया दुर्गं पथस्तत्कवयो वदन्ति॥
uttiṣṭhata jāgrata prāpya varān nibodhata kṣurasya dhārā niśitā duratyayā durgaṁ pathas tat kavayo vadanti
KaU 3.14