So for souls there is no possibility of communication unless they can enter someone’s body. That is why human birth is indispensable. For example, someone dies now, and if he remains in a bodiless state for one hundred years there is no development of any kind with anything during those hundred years. Remember The Days Veteran Unisex Hawaiian Shirt. He will start in a new birth from where he was when he died in the previous life – right from there – it does not matter how long that intervening period may be. This intervening period is not a time of development. It is like waking up in the same bed where you slept the night before.