Verse 5

चित्तसत्तेह दुःखाय चित्तनाशः सुखाय तु ।चित्तसत्तां क्षयं नीत्वा चित्तं नाशमुपानयेत्

In plain words

The very existence of citta is, in this world, for sorrow; the destruction of citta, for happiness. Having brought the existence of citta to its wasting, one should carry the citta on to destruction.