If we want to cultivate some understanding of what is meant by emptiness, we have to look for the reflections of emptiness within the mirror of the world of form. We need to look at the moments when our experience is transitional; when one sequence of events seems to conclude, and the beginning of another has not yet become obvious. There is a gap there – and that gap is emptiness.
p33, Wearing the Body of Visions, Ngakpa Chögyam, Aro Books, 1995, ISBN 1-898185-03-4