Is There a Oneness of Everything?

If we think that there is a connection between everything and that time is stacked, that means that every there is a variation of ourselves in all these different dimensions. And if i were to take everything on the energetic plane, and not just the three d plane, there's no separation between anything. They just only feel separate because of the plane that we're in. This has been proven true with a the use of psychodelics. Many people who have experienced a any type of psychodalic will tell you that they experience an oneness of everything.