From the Greek pan - 'all' and theos - 'god', literally "all is God".

In the Philosophy of Religion, one of the four major definitions of God. Pantheism asserts that God and the Universe are identical, i.e., God is the sum of all that exists; God and the universe are identical.

If the central tenet of Pantheism is that ‘god’ and ‘universe’ are synonyms, there are two distinct pictures of what the universe might be like: conscious and unconscious. A strict materialist could embrace Pantheism and hold that God just is the material universe and, in the absence of evidence to the contrary, there is no cosmic consciousness.

On the other hand, a Pantheist might believe that the universe does have a unique consciousness, and this is the mind of God. For those who think the universe is conscious, two further distinctions become possible: 1) those who think the universe is conscious of every fact in itself (omniscience), and those who think the cosmic consciousness is only aware of itself. This second position would be analogous to human consciousness in that we are aware of our own consciousness, but we are not usually aware, or even capable of being aware, of every fact in our body (unless something is wrong and we feel pain).