Praṇava-Māhātmya and the Twofold Mantra (Sūkṣma–Sthūla) in Śaiva Sādhanā
पुनःकारणरुद्र स्य लोकाष्टाविंशका मताः । पुनश्च कारणेशस्य षट्पंचाशत्तदूर्ध्वगाः
punaḥkāraṇarudra sya lokāṣṭāviṃśakā matāḥ | punaśca kāraṇeśasya ṣaṭpaṃcāśattadūrdhvagāḥ
Again it is taught that Kāraṇa-Rudra possesses twenty-eight worlds. And above those, further still, are the fifty-six worlds belonging to Kāraṇeśa, the Causal Lord.
Suta Goswami
Tattva Level: pati
Shiva Form: Sadāśiva
Cosmic Event: lokabheda (graded worlds above Kāraṇa-Rudra culminating in higher causal lordship)
It maps a Shaiva cosmology where progressively subtler realms culminate in the domain of the Causal Lord (Kāraṇeśa), implying that liberation is attained by turning from worldly planes toward Shiva as Pati, the ultimate cause beyond all lokas.
By presenting Shiva as the causal ruler of increasingly higher realms, it supports Linga worship as a Saguna focus that leads the devotee beyond limited worlds toward the supreme Kāraṇeśa, the transcendent source indicated by the Linga.
Contemplate Shiva as the Causal Lord while performing Linga-puja with the Panchakshara mantra (Om Namaḥ Śivāya), using the practice to transcend attachment to lower lokas and orient the mind toward moksha.