In ordinary perception these two pure modes are connected through symbolic reference where the experienced influence of a past occasion is referred to a particular vivid sense in the immediately presented duration. (religion-online.org)
We will begin by looking at the early history of photography, emphasizing genres such as spirit photography and motion studies, which allowed viewers to see beyond ordinary perception. (whitney.org)
But of course there is nothing to say this is not the case with ordinary perception. (religion-online.org)