When most people talk or write about God, they are not talking or writing about some ethereal entity only. They assign to that entity specific characteristics, even a personality. Certainly, the primary religions on this planet do that. So, when one asks if one believes in God, it's really a loaded question.

Of course, we humans live in a temporal world where everything has a beginning, a middle, and an end. Thus, we accrue that temporal continuum to everything.