Ishvara is a philosophical concept in Hinduism, meaning controller or the Supreme controller (i.e. God) in a monotheistic or the Supreme Being or as an Ishta-deva of monistic thought. Ishvara is a transcendent and immanent entity best described in the last chapter of the Shukla Yajur Veda Samhita, known as the Ishavasya Upanishad. It states "ishavasyam idam sarvam" which means whatever there is in this world is covered and filled with Ishvara.