For all their simplicity, humans could be remarkably perceptive, though they didn't know it most of the time, and their ability to thrust straight through deception and see to the heart of truth was often lost with childhood. By adulthood humans had trained themselves to be coy and manipulative in response to the coy and manipulative society in which they lived, which led them to believe that everyone was trying to be as coy and manipulative as themselves and were uncertain about what was true and what was not. Beyond their few flashes of clarity, everything became a muddle of colliding doubts.
Sean DeLauder, The Speaker for the Trees
human-nature