In Hinduism, Shiva is one of the principal deities and holds a significant place within the pantheon. However, the notion that Shiva is the entire universe is not a widely held belief within Hindu philosophy or scripture.
According to Hindu cosmology, the universe is vast and complex, consisting of multiple realms and dimensions. Shiva, as a deity, has various roles and attributes attributed to him. He is often regarded as the destroyer and transformer within the Hindu Trinity, alongside Brahma, the creator, and Vishnu, the preserver.
While Shiva is associated with cosmic forces and has a transcendent aspect, the idea of Shiva encompassing the entirety of the universe is not explicitly stated in traditional Hindu texts. The concept of the universe in Hinduism is usually portrayed as a vast cosmic creation governed by multiple divine forces and principles.
It's important to note that Hinduism is a diverse and multifaceted religion with a range of beliefs and interpretations. Different sects and schools of thought within Hinduism may have their own perspectives on the nature of Shiva and the universe.