Shocks and Memory
Memory is our sense that we are being shocked now as we were shocked then.
Shocks
Given matter conscious in one part of itself of a shock in another part (i.e. knowing in what part of itself it is shocked) retaining a memory of each shock for a little while afterwards, able to feel whether two shocks are simultaneous or in succession, and able to know whether it has been shocked much or little—given also that association does not stick to the letter of its bond—and the rest will follow.