As a general rule, 90% of the execution time of your program will be spent in 10% of its code. Profilers are tools that help you identify the 10% of hot spots that constrain the speed of your program. This is a good thing for making it faster.

But in the Unix tradition, profilers have a far more important function. They enable you not to optimize the other 90%! This is good, and not just because it saves you work. The really valuable effect is that not optimizing that 90% holds down global complexity and reduces bugs.

-- Eric Raymond, The Art of Unix Programming

(Applies to optimization in general)

I am the victim of a perversely designed set of incentives
You game the system
He is a crook.

-- Daniel of CrookedTimber

The whole post from which the quote is taken is quite interesting as well.

If, like the truth, falsehood had only one face, we should know better where we are, for we should then take the opposite of what a liar said to be the truth. But the opposite of a truth has a hundred thousand shapes and a limitless field.

— Montaigne, "On Liars"

Media carries with it a credibility that is totally undeserved. You have all experienced this, in what I call the Murray Gell-Mann Amnesia effect. (I call it by this name because I once discussed it with Murray Gell-Mann, and by dropping a famous name I imply greater importance to myself, and to the effect, than it would otherwise have.) Briefly stated, the Gell-Mann Amnesia effect works as follows. You open the newspaper to an article on some subject you know well. In Murray’s case, physics. In mine, show business. You read the article and see the journalist has absolutely no understanding of either the facts or the issues. Often, the article is so wrong it actually presents the story backward-reversing cause and effect. I call these the “wet streets cause rain” stories. Paper’s full of them. In any case, you read with exasperation or amusement the multiple errors in a story-and then turn the page to national or international affairs, and read with renewed interest as if the rest of the newspaper was somehow more accurate about far-off Palestine than it was about the story you just read. You turn the page, and forget what you know. That is the Gell-Mann Amnesia effect. I’d point out it does not operate in other arenas of life. In ordinary life, if somebody consistently exaggerates or lies to you, you soon discount everything they say. In court, there is the legal doctrine of falsus in uno, falsus in omnibus, which means untruthful in one part, untruthful in all. But when it comes to the media, we believe against evidence that it is probably worth our time to read other parts of the paper. When, in fact, it almost certainly isn’t. The only possible explanation for our behavior is amnesia.

“Why Speculate?” by Michael Crichton

"Mystics exult in mystery and want it to stay mysterious. Scientists exult in mystery for a different reason: it gives them something to do."

Richard Dawkins, The God Delusion, on the topic of mysterious answers to mysterious questions.

It is easier to imagine the rest of the universe being just as it is if a patient took pill A rather than pill B than it is trying to imagine what else in the universe would have had to be different if the temperature yesterday had been 30 degrees rather than 40. It may be the case that human actions, seem sufficiently free that we have an easier time imagining only one specific action being different, and nothing else.

• (T. Vanderweele, “Explanation in causal Inference” p. 453-455) – Quoted in J. Pearl, Blog post “Causation without Manipulation”

If the BBC, the UN, and specialists cannot agree on what the word means, neither can politicians or the police. Does it make sense to soldier on fighting a semantic battle that will never be won? Why argue for a word that everyone agrees in confusing and some find loaded?

Daniel Pipes, I Give Up: There Is No Terrorism, There Are No Terrorists

(Noteworthy for changing their opinion after decades of holding the opposite view)

When unsavvy observers see a nonprofit organization with dozens of people on its board, they think: “Look how many great people are committed to this organization! It must be extremely well run.” Actually, a huge board will exercise no effective oversight at all; it merely provides cover for whatever microdictator actually runs the organization.

Peter Thiel, Zero to One: Notes on Startups, or How to Build the Future

You are probably not cynical enough if you think you could beat seven billion people at cynicism.

--Alicorn? (I'm not sure exactly how authorship of these pages works)

While I’m impressed by an explanation that’s as flexible as a circus contortionist, I’d prefer something that isn’t consistent with any possible state of the universe. I’m no Popperian, but I like my theories to be at least a little bit falsifiable.

Scott Sumner

Perhaps the most important message to have emerged from these studies on instabilities is that we do not necessarily have a complete understanding of a system once we know the equations that govern it; what we really want to know are the particular solutions to those equations. The latter need not be obvious from the former. This cannot be emphasized too strongly in any branch of science. The American physicist Freeman Dyson has pointed out that for Albert Einstein and J.Robert Oppenheimer in their later years, 'to discover the right equations was all that mattered.' One might say the same about some physicists working today to develop a 'theory of everything'. But if you take this view, then fluid dynamics was all sewn up once we could write down the Navier-Stokes equation. Yet if we had stopped there, we'd never have guessed at the rich variety of solutions that it held in store even for relatively simple experimental set-ups (take a look again at Fig. 7.38, for instance). Sometimes even knowing the solutions is not enough—: only through experiments can one interpret what they are telling us.

Phillip Ball, The Self Made Tapestry: Pattern Formation in Nature p. 260

Emphasis mine.

SLAVER: What about the dwarf?

MALKO: Worthless. Cut his throat.

TYRION (The Dwarf): Wait, wait! Wait, wait, wait, let’s discuss this!

MALKO: And then chop off his cock. We can sell it for a fortune. A dwarf’s cock has magic powers.

TYRION: Wait, wait, wait, wait! You can’t just hand a dried cock to a merchant and expect him to pay for it. He has to know it came from a dwarf. And how could he know unless he sees the dwarf?

SLAVER: It will be a dwarf-sized cock.

TYRION: Guess again.

MALKO: The dwarf lives until we find a cock merchant.

From Game of Thrones

This relates to rationality because TYRION, in a moment of great stress, finds a convincing argument whose premise must have been repugnant to himself, analogous to a green tribe member quickly locating an argument that he finds detestable but blues find convincing.

A single example of extravagance or greed does a lot of harm--an intimate who leads a pampered life gradually makes one soft and flabby; a wealthy neighbor provokes cravings in one; a companion with a malicious nature tends to rub off some of his rust even on someone of an innocent and open-hearted nature--what then do you imagine the effect on a person's character is when the assault comes from the world at large? You must inevitably either hate or imitate the world. But the right thing is to shun both courses: you should neither become like the bad because they are many, nor be an enemy of the many because they are unlike you. Retire into yourself as much as you can. Associate with people who are likely to improve you. Welcome those whom you are capable of improving. The process is a mutual one: men learn as they teach.

--Seneca, Letter VII

Things don't necessarily happen for a reason; but things survive for a reason.

Nassim Taleb

When Baby Boomers grow up and write books to explain why one or another individual is successful, they point to the power of a particular individual’s context as determined by chance. But they miss the even bigger social context for their own preferred explanations: a whole generation learned from childhood to overrate the power of chance and underrate the importance of planning. Gladwell at first appears to be making a contrarian critique of the myth of the self-made businessman, but actually his own account encapsulates the conventional view of a generation.

Peter Thiel, Zero to One: Notes on Startups, or How to Build the Future

"One of the reasons we are attracted to the Colosseum is because of the incredible violence that went on here. The question it poses is, how could such an advanced culture have staged such bloody spectacles? The Colosseum is a snapshot in stone, a physical embodiment of the culture of Rome."

-- Gary Glassman (quoted in Colosseum killing machine reconstructed after more than 1,500 years

Emphasis mine: I'm not surprised. Culture is relative and I see lots of reasons this could have been beneficial to the society at that time.