अविचारवशादेष हृदयस्थोऽपि चेतनः ।न ज्ञायते चिरादृष्टो दृष्टबन्धुरिवाग्रतः
In plain words
Through the failure of inquiry, this conscious one, though seated in the heart, goes unrecognized — like a kinsman seen long ago, standing right there before one's eyes.