Ephemerality and transparency
In " Between Memory and History" the French Historian, Pierre Nora writes "It (Memory) remains in permanent evolution, open to the dialectic of remembering and forgetting, unconscious of its successive deformations, vulnerable to manipulation and appropriation, susceptible to being long dormant and periodically revived.” p 18
Memory, to me, is like a flimsy, transparent, net curtain. By projecting an image onto such a curtain, the constant alteration to memory is signified by both the transparency and movement.
Bill Viola has used a similar technique, with layers of net.