This propaganda tract outlines several optical illusions like the one seen on the cover. Both squares, A and B, happen to be the same color; but the human eye registers them as different shades because of comparison processing in the optic-nerve used to provide contrast between different shades. The pamphlet includes mirages, the apparent motion of the sun across the sky, and finally this:
“3. Then there’s the illusion that the sky is blue, when it actually has no color.”
This statement is false; it’s an example of the equivocation fallacy. The “sky” that we refer to as being blue is in fact the visible blueness of the canopy of atmosphere overhead. To refer to the blue sky in the same manner that we refer to the “sky filled with stars” or the sky being the region of air that clouds and aircraft travel through is to conflate different conceptions incorrectly. The sky’s azure hue is no more an illusion than a reflection in a mirror is an illusion.
“These sort of sensory perceptions don’t really matter, because they don’t have any serious repercussions. However, there is one that is a very serious deception. It’s the mistake when they think that they get into Heaven on the basis of their own goodness or by their own good works.”
That’s not an illusion…it’s mythology.
Illusions at least come from a reasonable superficial model of sensory perception—mirages look like water because the heated air ripples and refracts light; the sun appears to move across the sky because the Earth rotates in relation to it; and the sky is blue because of something called Rayleigh scattering. Each of the above so-called illusions relies on a reliable set of accessible evidence—air rippling visibly, the sun crossing the sky, the sky being blue—but religious mythology about Heaven has no such foundation, it exists only as an ad hoc assertion and a just-so story.
“If you were mistaken, wouldn’t you like to be told, or would you prefer to stay deceived when it comes to such an incredibly important matter.”
Here the pamphlet author goes back to the original statement that these other illusions “don’t really matter” and indicates that this is because they don’t have any serious repercussions. We can set aside that this ignores the potential plight of desert nomads whose knowledge of the mirage illusion would save lives. The rest of the sentence asks if you’d rather be told about a thing or be wrong about a potential illusion—in this case the ad hoc Heaven mythology.
How exactly do we know about the other illusions? We’ve tested them. The mechanics behind mirages, why the sun appears to be in motion, and why the sky is blue teach us more about the reality we live in. They are real manifestations that anyone can encounter and verify the effect of. The Christian mythology referred to in the pamphlet, however, has absolutely no method of external validation, it is not manifest, and therefore cannot tell us anything about the reality we live in.
“The Bible warns that if you are guilty on that [Judgment] Day you will justly end up in Hell.”
Of course, for any good propaganda, what is a reference to Heaven without it acting as a stalking horse for its ideological cousin the Threat of Hell. This is just an appeal to another ad hoc mythology to enforce obedience or evoke fear in the reader.
The artwork inside of the pamphlet is actually quite beautiful. Most of them are portrait illusions involving skulls that appear from the intersection of detail and overarching design. Sadly, none of the images are appropriately sourced.