Pantheism: a doctrine that equates God with the forces and laws of the universe (Merriam-Webster Dictionary).
Mine is a reason-driven religious philosophy, not faith-driven. I built my worldview from the fruits of my personal investigations of the reality which surrounds me, not being content to rely on folklore.
There is that prickly concept: God. The absolute, the ultimate, that which is greater than anything else, the ground of all being, the creator of everything.
But the question presents itself: Is God a person(s) or a metaphor?
Here the reason versus faith dichotomy is fundamental.
There are ancient, time-honored traditions that a deity (or deities) created the universe and man and rules over both. Many traditions, in fact. And they are hopelessly contradictory.
We have the well documented fact that throughout history humans have excelled in both imagination and creativity - the ancient religious traditions and myths being but one testament of that fact.
That not one of these imagined deities throughout all the millennia of human history has bothered to reside among and directly communicate with all his creatures and forever set the record straight seems to me - if a not a proof, then at least - an indication that we are dealing with non-entitites.
Humans have always been in awe of their natural surroundings and at the mercy of the terrible forces of nature. These are and always have been recognized as greater than humans.
The same evolving and advancing intelligence that learned to make and use tools, that learned to work along with nature in order to cultivate gardens, orchards, and vineyards for food, that tamed fire and invented the art of cooking, soon and quite naturally imposed those same ideas about design and intention upon those greater forces of nature and the universe that surrounded him. The human mind was obviously personal, and it was no great stretch for pre-scientific man to extend a similar personality to the forces of nature.
Therefore, I understand the stronger postulate to be that man created God(s) rather than the other way around.
Of course the sun and rain were understood to be divine blessings that allowed the nourishing crops to grow. Earthquakes, volcanoes, floods, and thunderstorms were surely signs of displeasure among the deities. Diseases seemed to be of divine origin, and the best treatments, slowly developed over long centuries of trial and error, were those provided by the gods of nature, such as healing herbs, fresh air and sunshine. But to this day we have not conquered the ravages of disease.
Humans throughout history continuously studied nature and learned more and more about her ways. Science slowly emerged as an alternative to mythological theology, although to this day some attempt to keep a foot in each camp.
For me, the scientific method is the true theology or study of God. And with the embracing of the scientific method comes the humbling confession that we don't know everything, and that all our scientific "facts" are provisional facts. The more the universe is studied, the more secrets she yields, and the possibility that certain facts may need to be revised frequently becomes a reality. Still - despite its incompleteness - the scientific method is the best handle on reality we have.
If there is a creator "God" it must the laws of physics that organize the raw elements into this wonderful cosmos. This ability of the elements to self-organize and display apparent design is the divine spark or Logos. It is that from which we came and to which we must eventually return.
In addition to that, God can be well employed as a metaphor for the highest of human ideals, especially with regard to ethics. The understanding that all of us are Citizens of the Cosmos and stand side by side in inherent equality give the greatest impetus to and proper ground for true religious practice and spiritual idealism.
I am a pantheist because, as a part of nature's intelligence, I stand together with my brothers and sisters in awe of the greatest intelligence, which is the well ordered Cosmos as a whole.