Adhyaya 8: Yogasthanas, Ashtanga Yoga, Pranayama-Siddhi, and Shiva-Dhyana leading to Samadhi
शुद्धस्य सिद्धयो दृष्टा नैवाशुद्धस्य सिद्धयः न्यायेनागतया वृत्त्या संतुष्टो यस्तु सुव्रतः
śuddhasya siddhayo dṛṣṭā naivāśuddhasya siddhayaḥ nyāyenāgatayā vṛttyā saṃtuṣṭo yastu suvrataḥ
Siddhis are seen to arise for one who is pure; for the impure, siddhis do not arise at all. But the one of noble vow who remains content with a livelihood obtained by righteous means becomes fit for the Shaiva path that leads the bound soul (paśu) toward the Lord (Pati), Śiva.
Suta Goswami (narrating the teaching on right conduct within the Linga Purana discourse)
It frames Linga-upasana as grounded in śauca (purity) and nyāya (righteous living); without inner and outer purity, ritual and mantra do not mature into genuine spiritual fruit.
By implication, Shiva (Pati) is approached through purification of the paśu (individual soul) from pāśa (bondage) such as impurity and unrighteous conduct; siddhi is a byproduct of alignment with that Shaiva order.
Pashupata-oriented discipline: śauca (purity), santoṣa (contentment), and nyāya-vṛtti (righteous livelihood) as foundational observances that stabilize mantra-japa and Linga-puja.