the mind spinning around the past and future isn't helpful to maintaining awareness in the here and now - which is far more relevant !
As a personal opinion, God, rebirth, reincarnation, or "something" that goes from here to there enduring endlessly, is nothing but only existential angst, fear, apprehension, attachment, craving for more, and the urgency of "becoming" or "being". When mind is at peace, still, awakened and clear none of such feelings abide.