According to Osho, in the gap between deaths and rebirths consciousness has no senses or body, so whatever it experiences is dreamlike—yet more vivid than waking life. Heaven and hell there are profound dream-states: bliss or torment feels absolute, inconsistencies go unnoticed, and doubt never arises. With a new body, those memories dissolve quickly, like dreams after waking.
Between lives it’s like a super-strong dream that feels totally real then, but fades when you get a new body.