Bhakti–Akṣara-Upāsanā-Viveka
Devotion to the Personal vs. Contemplation of the Imperishable
अपने-आप बछ। अर 3. संसारमें और शास्त्रोंमें जितने भी गुप्त रखनेयोग्य रहस्यके विषय माने गये हैं
Sorry—what you provided under “Bhishma Parva.34.18” is not a short Sanskrit verse, but a long Hindi commentary (ṭīkā/bhāṣya) explaining themes like “rāja-vidyā / rāja-guhya” from the Bhagavad Gītā. To translate accurately in an epic register, I need the actual Sanskrit śloka for 34.18 (or the exact passage you want translated).
अजुन उवाच