A quick message I received tonight.
Look at a lit candle in a dark room. See the flame shine and flicker. In a way the flame represents an akh. In the Seen world we can see that person, touch them, smell them, and see that light flicker in their eyes. However once they travel to the Unseen we do not see them as clearly.
Now that a white piece of cloth and look through it at the candle. While you can still see the light, it becomes blurred. In fact it looks like a star shining in the night sky. This is the veil of the Unseen. The light is still there, just not as clear. So are the akhu. Sometimes it just our perceptions that change.