[183] For at times inanimate objects have been imagined to be alive, and on the contrary living animals have been considered to be lifeless; sometimes again stationary things appear to be in motion, and things in motion appear to be standing still: even things which are approaching towards us do sometimes appear to be retreating from us, and things which are going away do on the other hand appear to be approaching. At times very short things seem to be exceedingly long, and things which have many angles appear to be circular. There is also an infinite number of other things of which a false impression is given though they are open to the sight, which however no man in his senses would subscribe to as certain.