rudra-rūpa dhari' kare jagat saṁhāra
sṛṣṭi-sthiti-pralaya — icchāya yāṅhāra
rudra-rūpa - the form of Lord Śiva; dhari' - accepting; kare - does; jagat saṁhāra - annihilation of the material world; sṛṣṭi-sthiti-pralaya - creation, maintenance and annihilation; icchāya - by the will; yāṅhāra - of whom.
Maheśvara, or Lord Śiva, is not an ordinary living being, nor is he equal to Lord Viṣṇu. Effectively comparing Lord Viṣṇu and Lord Śiva, the Brahma-saṁhitā says that Viṣṇu is like milk, whereas Śiva is like yogurt. Yogurt is nothing like milk, but nevertheless it is milk also.