Pantheism is the view that the natural universe is divine, the proper object of reverence; or the view that the natural universe is pervaded with divinity. Negatively, it is the idea that we do not need to look beyond the universe for the proper object or god of ultimate respect.
Most traditional religions have elements which are hard to believe or to reconcile with common sense, evidence or modern science. We choose to regard the universe with awe, reverence, love, feelings of belonging and a recognition of tremendous power, beauty and mystery. This is an aesthetic/emotional choice and basically lies beyond any challenge from logic or evidence. Not everyone shares those feelings – but there’s no basis to deny these choices to the people that feel this way.
In fact most people regard the universe or nature in that way but many are mislead by traditional religious teachings into seeing these things as evidence for deities they read about in their ancient scriptures. Pantheism proposes that those feelings are older and more basic than any traditional religion: they are a natural part of our existence as natural material beings. They are a recognition of our participation and belonging as members of nature and the universe. No matter why some of the greatest thinkers and artists are Pantheists, like Hegel, Spinoza, Mevlana, Beethoven, Michio Kaku, Nikola Tesla, Albert Einstein, Goethe, Tolstoy and many others, because it’s extremly peaceful and scientific.