The reason is - when focusing during out of body experiences - where linear time does not exist - traveling into what we call the future (grids) is easy. It's the ability to bring those events back to this timeline that's difficult for most people. We call it precognition meaning the purported psychic phenomenon of seeing, or otherwise becoming directly aware of, events in the future. Time is an illusion as is everything we experience in our simulation (virtual worlds).

We exist in the realm of "emotion as reality" where feelings make everything appear real when it fact it's all ones and zeroes and streaming consciousness. Humans require sleep to - relax the chatter, process, and reboot or reset their brain (bio-chemical computer). This can also be said of meditation which often results in sleep.