Full Idea
Earth, food, fire, sun - all these that you worship - are forms of Brahman.
Gist of Idea
Earth, food, fire, sun are all forms of Brahman
Source
Anon (Upan) (The Upanishads [c.950 BCE], 'Chandogya')
Book Reference
'The Upanishads', ed/tr. Prabhavananda /Manchester [Mentor 1957], p.67
A Reaction
In 'Taittiriya' food is named as the "chief of all things". Pantheism seems to arise from a desire that one's god should have every conceivable good, so in addition to power and knowledge, your god must keep you warm and healthy.