a perpetual exchange between the actual object and its virtual image: the virtual image never stops becoming actual. The virtual image absorbs all of a character’s actuality, at the same time as the actual character is no more than a virtuality. This perpetual exchange between the virtual and the actual is what defines a crystal; and it is on the plane of immanence that crystals appear. The actual and the virtual coexist, and enter into a tight circuit which we are continually retracing from one to the other. This is no longer a singularization, but an individuation as process, the actual and its virtual: no longer an actualization but a crystallization. Pure virtuality no longer has to actualize itself, since it is a strict correlative of the actual with which it forms the tightest circuit. It is not so much that one cannot assign the terms ‘actual’ and ‘virtual’ to distinct objects, but rather that the two are indistinguishable.
Gilles Deleuze in gesprek met Claire Parnet