Verse 12

वाक्प्रपञ्चं विना त्वेतदज्ञानमतुलं तमः ।भेत्तुमन्योन्यमुदितं यत्नं कर्तुं न शक्यते

In plain words

But without this proliferation of speech it is impossible to make the effort, arising between the two of us, to pierce this ignorance, this unequalled darkness.