अभिलाषाद्बहिर्गतिः संवाह्यस्य ॥४०॥
abhilāṣād bahir-gatiḥ saṃvāhyasya
sūtra
From desire (alone) comes the outward-going (of) the soul carried (about by saṃsāra).
From desire (alone) comes the outward-going (of) the soul carried (about by saṃsāra).