I am an Old Believer. That came from before that upstart Baal,
Baal is I think the first retail religion. Sumarians had Gods, and stories told for millennium before written down.
Gilgamesh is older than anyone, and tries to put thought to the unknowable.
Sumarian knew they could not know, their Gods are wind and rain, sunlight and time.
Jewish, Christian, Islam, are but tribal centered collections taken from prior works.
Spirits in Nature is as close as we can reach for some truth. We will never know, but a single experience is enough to show that another larger world confines the one we live in.
The two paths, some claim to know, to be able to control reality through rites. Baal was the first one stop shopping who had an answer for everything. All churches and spiritualists claim total knowledge.
The Shamans say we are the disconnected piece in something larger, and at best we can see glimpses of the larger world. All things are connected, the birds and herds know when to go north, and come south before the force of winter catches them. They must leave while the weather is still good, travel at a speed for six hundred kilometers, and while no two years are the same, the herds will arrive at their safe southern pastures the day before winter takes all the lands they crossed.
Shamans were into Swans. Swans are the first to leave in Spring, and the last to return. When you see the Swans in Fall, Winter comes the next day.
Some places have a resident Spirit. Springs and Groves were long known to be the home of something. It is thought that in some places our reality touches another, and our worlds overlap. Sometimes it is seeing things that vanish, sometimes it is the people who vanish, and there is the story of the Green Children who showed up in England, a brother and sister, who spoke a language none could identify, had green skin, and when they learned to speak English, said they came from Saint Martin, where It is always twilight, they were herding cattle, then found themselves walking down an English road.
Stories of other creatures showing up are as old as stories. They are not human, but are intelligent. In most of the stories the creatures live in the wild and avoid humans. Some are very human, and live with wolves.
It has long been thought that they could bestow a blessing or a curse on humans.
Whole cultures were based on seeing the world beyond. People gathered, drank Soma, and watched like a movie, as the veils between the worlds were lifted. They all came away knowing that our world is but a part of a system of worlds. Do not let others define you, Pagan is a Motorcycle Club. Spirits are not other false gods, where they have been met in peace, they were said to be wise and friendly, but creatures like ourselves.
Not all Spirits take form, some have to be known to be seen. Shamanism is much more complex than Religion.
We have none of the answers, all of the questions, and the deeper in you look, the more complex it becomes.
For 10% of your income I will tell you I know everything, and can protect you from all the unseen forces.
I take Paypal.