Edward Tufte's grand truths about human behavior

Short, good. Some of my favorites:

"It is a principle that shines impartially on the just and the unjust that once you have a point of view all history will back you up." (Van Wyck Brooks)
All the world is multivariate.

Much of the world is distributed lognormally. 

In explanations of human activities, both muddling through and incompetence are under-estimated, and both rational optimizing and conspiracy over-estimated.

Nearly all self-assessments claim above-average performance.

"Upon expecting fair play in high places: You'll get it if enough folk are watching." ( J. P. Donleavy's variant of Wendell Phillips' "Eternal vigilance is the price of liberty.")