657. That by the "lowest, second, and third stories" are signified things of knowledge, of reason, and of understanding [scientifica, rationalia, et intellectualia] follows also from what has been shown. There are three degrees of things intellectual in man; the lowest is that of knowledge [scientificum]; the middle is the rational; the highest, the intellectual. These are so distinct from each other that they should never be confounded. But man is not aware of this, for the reason that he makes life consist in what is of sense and knowledge only; and while he cleaves to this, he cannot even know that his rational part is distinct from that which is concerned with knowing [scientificum]; and still less that his intellectual part is so. And yet the truth is that the Lord flows through man's intellectual into his rational, and through his rational into the knowledge of the memory, whence comes the life of the senses of sight and of hearing. This is the true influx, and this is the true interaction of the soul with the body.
Without influx of the Lord's life into the things of the understanding in man-or rather into things of the will and through these into those of understanding-and through things of understanding into things rational, and through things rational into his knowledges which are of the memory, life would be impossible to man. And even though a man is in falsities and evils, yet there is an influx of the Lord's life through the things of the will and of the understanding; but the things that flow in are received in the rational part according to its form; and this influx gives man the ability to reason, to reflect, and to understand what truth and good are. But concerning these things, of the Lord's Divine mercy hereafter; and also how the case is with the life that pertains to brutes.