A person who believes in the existence of a God or gods but does not adhere to any specific religious doctrine or practice is often described as "spiritual but not religious" or simply "believer without religion."
This perspective resonates with many people today. Being "spiritual but not religious" allows individuals to explore their beliefs and connect with a higher power in a personal and meaningful way, without the constraints of formal doctrine. It’s fascinating to see how spirituality can be a unique and individual journey.