There is no indication that which can give a knowledge of the Unseen. That which cannot be described in language, cannot be acquired by anyone.
अव्यक्तस्येह विज्ञाने नास्ति तुल्यं निदर्शनम्। यत्र नास्ति पदन्यासः कस्तं विषयमाप्नुयात्॥