Verse 37

आलोक आगते यादृक्तमस्तद्दृश्यते तथा ।याऽवस्तुत्वे त्वविद्यायास्त्ववस्तुत्वं प्रतीयते

In plain words

Just as darkness, when light has come, is seen exactly for what it is, so in the very unreality of avidyā, only its unreality comes to be recognized.