If, as these same men admit, these determining presentations themselves do have the basis of their existence in time and moreover in the previous state, and this state in turn in a preceding one, etc., then by all means let them these determinations be internal, let them have psychological rather than mechanical causality,.e., produce action through presentations rather than through bodily motion: they are always determining bases of the causality of a being insofar as this being's existence is determinable in time and hence under necessitating conditions of past time.