स यथा शङ्खस्य ध्मायमानस्य न बाह्याञ्छब्दाञ्छक्नुयाद्ग्रहणाय ।शङ्खस्य तु ग्रहणेन शङ्खध्मस्य वा शब्दो गृहीतः ॥४,५.९ ॥
In plain words
and as when a conch is blown one cannot lay hold of the outward sounds, but by laying hold of the conch, or of the blower of the conch, the sound is laid hold of;