I have been contemplating those words of David Bohm, “Frozen Light,” trying to understand them myself. I think we need to go beyond our conceptualization of something frozen as being perfectly still for a period of time. It’s not still, but in a continuous state of flux. Consciousness can briefly fixate upon its object and create the illusion that it hasn’t already changed. But then consciousness itself is in a continuous state of flux. It revisits the object and imputes continuity, as if its first and subsequent perceptions are identical over a period of time. We know this is illusory. Therefore it’s more accurate to think of frozen light as a sequence of moments in which consciousness briefly fixates within its own ground under the illusion of continuity.
I suspect from David’s background that the light he refers to is the energetic nature of clear light, and not light from the sun or some other physical source, but then frozen can only refer to our own fixated illusion of things actually holding still, even for a moment in time. Things bond into forms and dissolve those bonds continuously dependent upon a vast array of causes and conditions all operating simultaneously. What holds them together is the illusion that they are in-fact holding together, and that they have some independent continuity. Perhaps that is Marigpa, which is causal to all our illusions, but I’m not sure if it’s more accurate to say that it is the result of Marigpa.