How did the universe and the world come into being from Brahman, based on this philosophy?

Chapter 50 describes a specific cosmological sequence for how the world emerged from Brahman. The process begins when the pure, unmanifest Brahman becomes 'qualified' (shabal) by its association with Avidya, or ignorance. This qualification makes Brahman expressible, giving it the name 'Sat' (Existence) and allowing it to be grasped by the intellect, taking form through 'Omkar'. From this expressible Brahman, the 'Unmanifest' (Avyakta) emerged. The creation cascade continued as the 'Great Principle' (Mahat-tattva) arose from the Unmanifest, and within the Great Principle, egoism was born. Subsequently, the five Tanmatras (subtle elements) emerged from egoism, and from them, the five great elements were formed. Finally, as Chapter 50 states, the entire world was born from the womb of these five great elements.