On vision.........................................

"A part of good science is to see what everyone else can see but think what no one else has ever said."

"It is sometimes easier to make the world a better place than to prove you have made the world a better place."

"A theory of vision cannot be faulted for predicting optical illusions.  Similarly, a descriptive theory of choice cannot be rejected on the grounds that it predicts 'irrational behavior" if the behavior in question is, in fact, observed."

Amos Tversky, as quoted in The Undoing Project:  A Friendship That Changed Our Minds