Verse 12

एकोदये द्वितीयस्य न सत्ता दिनरात्रयोः ।ज्ञानं नाज्ञानतामेति च्छाया नायाति तापताम्

In plain words

When one rises, the other has no being — as with day and night. jñāna does not become ajñāna; shade does not turn into heat.