At the retreat last week, one of the participants quoted from a book describing seeing people and things as light. Joel said it is a metaphor, but is that really so?
I find that much of what may appear as a metaphor is really the most direct way of talking about certain experiences. Emptiness is really a noticing of the no-thingness that everything comes out of and is. Luminosity is really luminosity. The luminous blackness is really experienced as black.
In these cases, it is experienced quite directly as empty, luminous and a luminous blackness.