At the level of the subject's activity, "positing reflection" occurs when I am directly active; in "external reflection," the Other is active and I merely passively observe it. (Zizec).
(Felsefe) Hegel defines reflection as, the movement of nothing to nothing, and so back to itself and is the negation that coincides with itself. Reflection is the movement of negation of nothing, that is without passing over to nothing, back to itself, thereby equating with itself. Movement in the sphere of being, that is, external, sensuous motion is the transition from determinate point to another point. While at one and the same moment moving something is both here and not here, considering two different moment, the second point is nothing in relation to first point as being. What is permanent during motion implies essence, in other words all relativity to what is external is sublated in the character of what is essential. For this reason, the movement of essence is from nothing to nothing. Time is the expression of movement. However, the movement of positing reflection does not imply time