उलूकस्य यथा भानावन्धकारः प्रतीयते ।स्वप्रकाशे परानन्दे तमो मूढस्य भासते ॥ ४७ ॥
In plain words
The owl turns toward the sun and sees only darkness. In the same way, the deluded person turns toward that self-luminous supreme bliss — and darkness is all that shows itself there.
Close to the Sanskrit
Just as, for the owl, darkness is perceived in the sun, so in the self-luminous supreme bliss darkness appears for the deluded one.