Sri Brahma-Samhita

References to text BS 5.45
BS 5.45: Just as milk is transformed into curd by the action of acids, but yet the effect curd is neither same as, nor different from, its cause, viz., milk, so I adore the primeval Lord Govinda of whom the state of Åšambhu is a transformation for the performance of the work of destruction.

Text â„–
“ ‘Milk changes into yogurt when mixed with a yogurt culture, but actually it is constitutionally nothing but milk. Similarly, Govinda, the Supreme Personality of Godhead, assumes the form of Lord Åšiva [Åšambhu] for the special purpose of material transactions. I offer my obeisances at His lotus feet.’
Lord Sri Caitanya Mahaprabhu Instructs Sanatana Gosvami in the Science of the Absolute Truth
CC 2.20.310