Why do I " believe in" my Goddesses and Gods?
That is entirely based on my personal experience. I have experienced reality in a way that makes me assume the existence of multiple forms of divinity and spirit in this world.
I cannot prove this with scientific method, and I do not try it. It's just my personal reality, I don't claim that it needs to be everyone's reality nor can I claim to understand absolute truth any better than other humans.
Further, I choose to visualize and address this divinity in the guise of the Egyptian Pantheon and using Egyptian concepts. This is for personal and pragmatic reasons: this religious practice is effective for me and fits with my personal spiritual experiences. It helps me organize my life and my understanding of the world and gives me a plausible framework for all phenomena I observe in nature.
Why do I "believe in" evolution?
I don't. It's not a matter of belief, it is a scientific theory. I confirm that based on our current scientific and measurable understanding of the world, evolution is by far the most plausible explanation for development of life on earth.
Evolution, as scientific theory in its current form, doesn't contradict any of my religious concepts. Quite the opposite.
I see deities as manifestations of natural laws and powers, not as transcendent demiurges. I think they have the power to put a thumb on the scale sometimes, and bend things in the one or the other direction... But they have neither the power nor the intent to guide every single atom according to one unified will and plan. They don't control the universe: they are the universe.
Some examples:
- evolution suggests that all life comes from a common ancestor and shares a fundamental common nature.
- evolution sees humans not a the culmination of an teleological development, but rather a chance variation springing from a messy system
- evolution doesn't measure the value or rank of a species by its brain size or its usefulness to man
- evolution shows that wonderful diversity can spring from a few basic principles
- evolution demonstrates how contradictory forces can combine to create a complex and balanced ecosystem
If I look at all of those points from the perspective of my polytheistic and animistic religion, I can only say: I agree. That fits perfectly into my spirituality.
So yes, I assume that gods and goddesses exist, and I also think that evolution is a splendid, useful and exceptionally well-supported scientific theory.