Related:

• Laws should not depend on a particular choice of notation. -- The Principle of Indifference
• Bion insisted on the principle that "The property of friends is common.
  -- Diogenes Laertius (c. 200 AD) -- Bion, ix...
• Reason is not measured by size or height, but by principle.
  -- Epictetus (c. 60 AD) -- Discourses, Book i, Chap. xii...
• Much may be done in those little shreds and patches of time
  which every day produces, and which most men throw away, but which nevertheless will make at the end of it no small deduction for the life of man....
• heisenbug /hi:'zen-buhg/ n. [from Heisenberg's Uncertainty Principle in quantum physics] A bug that disappears or alters its behavior when one attempts to probe or isolate it.
  (This usage is not even particularly fanciful...
• heisenbug: /hi:'zen-buhg/ [from Heisenberg's Uncertainty Principle in quantum physics] n.
  A bug that disappears or alters its behavior when one attempts to probe or isolate it....
• None are so fond of secrets as those who don't mean to keep them. -- C. C. Colto
• The Pet Principle: No matter which side of door the cat or dog is on, it's the wrong side.
• Logic - the principle on which all computers are built, but none seem to run under.