Verse 17

ऊर्ध्वं केचिदधः केचित्केचिन्मध्ये नियोजिताः ।केचिच्चिरेण नश्यन्त केचिच्छीघ्रविनाशिनः

In plain words

'Some are set above, some below, some placed in the middle; some perish only after a long time, others perish swiftly.'