Mantra 6

तद्यथेह कर्मजितो लोकः क्षीयत एवमेवामुत्र पुण्यजितो लोकः क्षीयते तद्य इहात्मानमनुविद्य व्रजन्त्येतांश्च सत्यान्कामांस्तेषां सर्वेषु लोकेष्वकामचारो भवत्यथ य इहात्मानमनिवुद्य व्रजन्त्येतंश्च सत्यान्कामांस्तेषां सर्वेषु लोकेषु कामचारो भवति ॥ ८.१.६ ॥

In plain words

so, as here a world won by works perishes, so in the world beyond a world won by merit perishes. Those who go hence without having found the Self and those true desires — for them there is no moving at will in any world. But those who go hence having found the Self and those true desires — for them there is moving at will in all the worlds.