Sādhana Pāda · Sutra 18
प्रकाशक्रियास्थितिशीलं भूतेन्द्रियात्मकं भोगापवर्गार्थं दृश्यम्
prakāśakriyāsthitiśīlaṃ bhūtendriyātmakaṃ bhogāpavargārthaṃ dṛśyam
The seen has the nature of luminosity, activity, and stability; consists of the elements and senses; and has as its purpose experience and liberation.
This sutra describes dṛśya (prakṛti, the seen) in three aspects:
Its nature is formed by the three guṇas: prakāśa (luminosity, sattva), kriyā (activity, rajas), and sthiti (stability, tamas).
Its composition includes the bhūtas (elements) and the indriyas (senses), the entire field of objective experience.
Its purpose is twofold: bhoga (experience) and apavarga (liberation). Prakṛti is not the enemy of puruṣa; it exists so that puruṣa may experience and eventually awaken.
The world is not a prison, but a school. Through experience, puruṣa learns to discriminate and eventually becomes free.