Has anyone here experienced OBE (out of body experience)? Or astral projection?

[kentauros]

57. It's staying flat relative to an upright human.

The line on the plane must be at eye-level to be perceived as a point at the end of the rotation.

If that's too confusing, just think of looking straight down the line, as if it's exactly in the "line of sight" of one eye. If you keep the other eye closed, then you can't see the sides that way, whether left, right, or top, bottom. All you should see is a point.

Or, forget that analogy all together and try the layers example. If you've ever used Photoshop, then you know a little about layers. AutoCAD layers all all transparent, but you have to make Photoshop layers less opaque to see through them. Each layer is a single moment in time. If you focus on a single layer, then you are in that moment.

I don't mind explaining this further if you need it.