1641. And it could not be otherwise. Of this anyone can be convinced by everything that meets our outer vision. Although this vision appears to us to be very sharp, there is in fact hardly any faculty so dull and dim. This is plainly evident, beyond any possible doubt, when one considers all the objects exposed to the sight. Our inward sight, which we think of as subtle, is very dense, as I have at times said to spirits who believed their thinking so sharp that no one understood it. It is so dense, I said, that if they thoroughly looked at just one mental image, and saw how much was in it, troops of elephants, or armies and phalanxes of snakes would be portrayed if it were opened up. This spirits cannot believe, either, because like most people on earth, they consider as the sharpest among them the one who is the least sharp of all. 1748, 23 March.