15. Fluids being the vehicle of the thought, the latter acts upon them, as the sound does upon the air. They bring us the thought, just as the air brings us the sound. We can, then, say with all truth that in such fluids there are waves and rays of thoughts that cross each other without ever becoming entangled, as do the waves and sonorous rays in the air.
Moreover, the thought creates fluidic images and reflects itself back on its perispiritual body, as on a mirror; the thought takes on body and somehow photographs itself on it. Let us say, for example, that a man has the idea of murdering someone; although his material body is inactive, his fluidic body is - through the thought - put into action, reproducing from this all vibrations. The act he tried to practice is executed fluidicly. The thought creates the image of the victim and, similarly to a picture, the entire scene is drawn, precisely as it is in his spirit.
This is how the innermost secret movements of the soul are reverberated onto the fluidic body; and how one soul can read another, as one reads a book; and how it sees what is not perceptible by the eyes of the body. Yet, although the intention is seen and it can foresee the subsequent execution of the act, it cannot determine the moment it will take place; neither can it be exact with details, or even affirm whether it will indeed take place, as later circumstances can modify the plans and change the dispositions. The soul cannot see that which is not yet in another person’s thought. What it does see is the habitual preoccupation of the person, his desires, his projects, and his good or bad intentions.