1445. They went around the planet Venus for the reason that more interior things can thus be brought into communication with externals by means of the interior senses; otherwise there is no communication. Thus it is by means of interior sense that things, as it were, external communicate with those more interior, just as there can be no communication of things rational except by means of the memory of material ideas, thus neither of things intellectual except by means of the memory which is called interior, that is, by means of interior sense. He who does not know these things does not know how man can enjoy the faculty of understanding, that is, of thinking, judging, concluding, and finally determining and willing, for such things do not flow from the memory of material ideas which are derived immediately from or by means of the external senses.