Googling around in connection with my review of Unspeak, I came across an old LanguageLog post on The apparent deceptiveness of the world, which cites the paradoxical statement
Appearances are not deceptive; it only seems as if they are.
and invites Brian Weatherson (who’s now one of the crew at Crooked Timber) to analyse it, saying
Clearly, if this is true, then it has to be false, and if false, it must be true. Yet it is not a standard liar-paradox sentence like as in classic liar sentences like This statement is false, or Everything I tell you is a lie, including this. It does not mention truth or falsity, or refer to itself. It is a metaphysical claim, as far as I can see. It speaks not about language or truth but about the nature of reality. It says (contrary to the old proverb) that reality does not present itself in a way that deceives our senses, and any perception we may have to the contrary is incorrect.
I think we can extract a coherent claim with the aid of Hamlet’s observation “For there is nothing either good or bad, but thinking makes it so”. I’d read the statement as saying something like “First appearances are not deceptive; it’s thinking about them that leads you astray”. While this is obviously false as a general statement, I think direct perceptions are usually closer to the mark than the results of the kinds of analysis (Freudianism, large parts of Marxism, a lot of public choice theory) that purports to strip away surface appearances and reveal the underlying truth.