The dead goes through cleansing, removing any limitations born through their physical bodies. A mass of pure energy condensed in different processes based on their mental state.
A happy or sad, an excited or mad healthy or sick creature, dies of old age or is killed by another. As it dies, it's soul is purged and purified by the air as it rises into "heaven". The creature's memories are erased as the purification removes any and all that affects the soul's essence.
In "Heaven" the spirit has no form yet it has energy. It has consciousness.
A spirit lives in "Heaven" without a form, yet with a consciousness. A spirit is a being with no limits.
In "Heaven" there is an abundant amount of energy. It is the foundation of life, spirits tend to not look for anything else as "Heaven" is like a huge, beautiful and well cared for garden with enormous amounts of fruits and vegetables of all kind. It was all they needed.
No questions asked, or suspicions raised. The spirits happily lived their life in the so called "Heaven".
One such newly joined spirit was enjoying it's first day. This particular spirit was an observant spirit, watching the behaviour of others. Seemingly acting superior in contrast to it's arrival yet careful and cheering.
A group of spirits ahead were moving in chaotic order, glitching in and out of time. This observation touched his curious form and wondered the point of such things. The young spirit tried to do the same, but it couldnt control it yet. It moved one step infront and saw itself taking said step infront of it. It moved two steps back and saw parallels of itself doing the same thing. This amused the young spirit, the point of this action didn't matter anymore. It was fun.