। ॥ २२६ ॥
In plain words
Knowing that Brahman and the self are one, the one who knows it wants out — wants the noose of saṃsāra untied. That wanting is what is called mumukṣutva.
Close to the Sanskrit
From the direct knowledge of the oneness of Brahman and the Self, that which the knower desires — to loosen the bondage of the noose of saṃsāra — that is declared to be mumukṣutva.