Self-knowledge refers to understanding one's nature and identity across spiritual traditions. Many traditions converge on the importance of introspection and self-awareness. They diverge in methods and interpretations, offering unique perspectives.
The one God, hidden in all beings, all-pervading, the inner Self of all beings, the overseer of all works, dwelling in all beings, the witness, the pure consciousness, alone and beyond the qualities.
Smaller than the small, greater than the great, the Self is set in the heart-cave of this creature. Free from desire and from sorrow, one beholds him, the majesty of the Lord, through the grace of the Creator.
Subtler than the subtle, greater than the great, the Self is set in the cave of the heart of this creature. One who is without craving sees it, freed from sorrow, and, by the grace of the Ordainer, beholds the greatness of the Self.
If the slayer thinks he slays, and if the slain thinks himself slain, both fail to understand: this one neither slays nor is slain.
हन्ता चेन्मन्यते हन्तुँ हतश्चेन्मन्यते हतम् । उभौ तौ न विजानीतो नायँ हन्ति न हन्यते ॥ १९॥
The knowing Self is neither born nor dies; it did not come from anywhere, nor did it become anyone. Unborn, eternal, everlasting, ancient, it is not slain when the body is slain.
न जायते म्रियते वा विपश्चि- न्नायं कुतश्चिन्न बभूव कश्चित् । अजो नित्यः शाश्वतोऽयं पुराणो न हन्यते हन्यमाने शरीरे ॥ १८॥
The Person the size of a thumb, the inner Self, is always seated in the heart of people. One should draw him out from one's own body with firmness, like a reed stalk from its sheath. Know him as the bright one, the immortal; know him as the bright one, the immortal.
The eternal among the transient, the conscious among the conscious, the one who grants the desires of the many—the wise who perceive him as seated within themselves, to them belongs eternal peace, and to no others.
What is invisible, ungraspable, without lineage, without color, without eye or ear, without hands or feet, eternal, all-pervading, everywhere, most subtle, undecaying—that the wise perceive as the source of all beings.
No one has grasped him from above, or from across, or in the middle. There is no likeness of him whose name is great glory.
नैनमूर्ध्वं न तिर्यञ्चं न मध्ये न परिजग्रभत् । न तस्य प्रतिमा अस्ति यस्य नाम महद् यशः ॥ १९॥
Subtler than the subtle, like the cream that rises beyond the butter — knowing him as Śiva, hidden in all beings, the one encompasser of the universe, knowing God, one is freed from all bonds.
The all-pervading Self, set within like butter within milk, rooted in Self-knowledge and austerity — that is the supreme Brahman taught in the Upanishad.
This Self is not attained by teaching, nor by intellect, nor by much learning. It is attained only by the one whom it chooses; to him this Self reveals its own form.
नायमात्मा प्रवचनेन लभ्यो न मेधया न बहुना श्रुतेन । यमेवैष वृणुते तेन लभ्यः तस्यैष आत्मा विवृणुते तनूꣳ स्वाम् ॥ २३॥
Having received this knowledge taught by Death, and the whole method of yoga, Nachiketas attained Brahman, became free of passion and free of death. So too does any other who thus knows the Self.
मृत्युप्रोक्तां नचिकेतोऽथ लब्ध्वा विद्यामेतां योगविधिं च कृत्स्नम् । ब्रह्मप्राप्तो विरजोऽभूद्विमृत्यु- रन्योऽप्येवं यो विदध्यात्ममेव ॥ १८॥