Is it possible to not believe in god, and still believe in a higher power? It could be Mother Nature, Karma, or simple spirituality.
People can believe anything:
The Earth is flat.
Bloodletting heals yellow fever, tuberculosis, smallpox and other diseases.
President Obama is a Muslim.
Noah's Ark.
The Rapture.
Vaccines cause autism.
It’s entirely possible for the human mind to believe absolutely anything....as witnessed by some of the crazies who believe in conspiracy theories, alien landings and that the earth is flat. Evidence is the one thing that is lacking in all of these cases, as it is with a belief in a god or gods. My own belief is that there is no answer to the unknowable and anything else is pure conjecture.
One can believe in anything. Proof is always the thing that remains elusive.