Physics can only explain things so far as they perform transitive activities.
Experience, knowledge (therefore science) and life are not transitive activities, but immanent ones.
Aristotle describes the difference between the two by saying that transitive activities are not complete while being done, but immanent activities are. Every act of sensation, for example, is a complete act of sensation; but every act of moving from here to there is not complete until the thing reaches the last point.
Moreover, immanent activities are the cause of the transitive ones, as Plato proves in book X of the Laws.
