Yōga Sūtra 2.25

तदभावात्संयोगाभावो हानं तद्दृशेः कैवल्यम्।

tadabhāvātsaṁyōgābhāvō hānaṁ taddr̥śēḥ kaivalyam।

[तत् अभावात् संयोगः अभावो हानं तत् दृशेः कैवल्यम्।
tat = by its; abhāvāt = absence; saṁyōgaḥ = in-unison; abhāvō = scarcity of; hānaṁ = destruction; tat = by its; dr̥śēḥ = observer; kaivalyam = obtains ultimate happiness;]

Absence of ignorance results in destruction of obstacles to being in-unison, from it, seer obtains ultimate happiness (kaivalyam).