"Wait, Professor... If Sisyphus had to roll the boulder up the hill over and over forever, why didn't he just program robots to roll it for him, and then spend all his time wallowing in hedonism?"
"It's a metaphor for the human struggle."
"I don't see how that changes my point."

• SMBC Comics #2719

Do unto others 20% better than you expect them to do unto you, to correct for subjective error.

-- Linus Pauling

“A writer who says that there are no truths, or that all truth is ‘merely relative,’ is asking you not to believe him. So don’t.” ― Roger Scruton, Modern Philosophy: An Introduction and Survey

The person who says, as almost everyone does say, that human life is of infinite value, not to be measured in mere material terms, is talking palpable, if popular, nonsense. If he believed that of his own life, he would never cross the street, save to visit his doctor or to earn money for things necessary to physical survival. He would eat the cheapest, most nutritious food he could find and live in one small room, saving his income for frequent visits to the best possible doctors. He would take no risks, consume no luxuries, and live a long life. If you call it living. If a man really believed that other people's lives were infinitely valuable, he would live like an ascetic, earn as much money as possible, and spend everything not absolutely necessary for survival on CARE packets, research into presently incurable diseases, and similar charities.

In fact, people who talk about the infinite value of human life do not live in either of these ways. They consume far more than they need to support life. They may well have cigarettes in their drawer and a sports car in the garage. They recognize in their actions, if not in their words, that physical survival is only one value, albeit a very important one, among many.

-- David D. Friedman, The Machinery of Freedom

There is something about practical things that knocks us off our philosophical high horses. Perhaps Heraclitus really thought he couldn't step in the same river twice. Perhaps he even received tenure for that contribution to philosophy. But suppose some other ancient had claimed to have as much right as Heraclitus did to an ox Heraclitus had bought, on the grounds that since the animal had changed, it wasn't the same one he had bought and so was up for grabs. Heraclitus would have quickly come up with some ersatz, watered-down version of identity of practical value for dealing with property rights, oxen, lyres, vineyards, and the like. And then he might have wondered if that watered-down vulgar sense of identity might be a considerably more valuable concept than a pure and philosophical sort of identity that nothing has.

John Perry, introduction to Identity, Personal Identity, and the Self

If only there were evil people somewhere insidiously committing evil deeds, and it were necessary only to separate them from the rest of us and destroy them. But the line dividing good and evil cuts through the heart of every human being, and who is willing to destroy a piece of his own heart?

Solzhenitsyn

A problem well stated is a problem half solved.

Charles Kettering

Nobody is smart enough to be wrong all the time.

Ken Wilber

Lady Average may not be as good-looking as Lady Luck, but she sure as hell comes around more often.

Anonymous

...beliefs are like clothes. In a harsh environment, we choose our clothes mainly to be functional, i.e., to keep us safe and comfortable. But when the weather is mild, we choose our clothes mainly for their appearance, i.e., to show our figure, our creativity, and our allegiances. Similarly, when the stakes are high we may mainly want accurate beliefs to help us make good decisions. But when a belief has few direct personal consequences, we in effect mainly care about the image it helps to project.

-Robin Hanson, Human Enhancement

"He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his candle at mine, receives light without darkening me. No one possesses the less of an idea, because every other possesses the whole of it." - Jefferson

“The goal of the future is full unemployment, so we can play. That’s why we have to destroy the present politico-economic system.” This may sound like the pronouncement of some bong-smoking anarchist, but it was actually Arthur C. Clarke, who found time between scuba diving and pinball games to write “Childhood’s End” and think up communications satellites. My old colleague Ted Rall recently wrote a column proposing that we divorce income from work and give each citizen a guaranteed paycheck, which sounds like the kind of lunatic notion that’ll be considered a basic human right in about a century, like abolition, universal suffrage and eight-hour workdays. The Puritans turned work into a virtue, evidently forgetting that God invented it as a punishment.

-- Tim Kreider

The interesting part is the phrase "which sounds like the kind of lunatic notion that’ll be considered a basic human right in about a century, like abolition, universal suffrage and eight-hour workdays." If we can anticipate what the morality of the future would be, should we try to live by it now?

After I spoke at the 2005 "Mathematics and Narrative" conference in Mykonos, a suggestion was made that proofs by contradiction are the mathematician's version of irony. I'm not sure I agree with that: when we give a proof by contradiction, we make it very clear that we are discussing a counterfactual, so our words are intended to be taken at face value. But perhaps this is not necessary. Consider the following passage.

There are those who would believe that every polynomial equation with integer coefficients has a rational solution, a view that leads to some intriguing new ideas. For example, take the equation x² - 2 = 0. Let p/q be a rational solution. Then (p/q)² - 2 = 0, from which it follows that p² = 2q². The highest power of 2 that divides p² is obviously an even power, since if 2^k is the highest power of 2 that divides p, then 2^2k is the highest power of 2 that divides p². Similarly, the highest power of 2 that divides 2q² is an odd power, since it is greater by 1 than the highest power that divides q². Since p² and 2q² are equal, there must exist a positive integer that is both even and odd. Integers with this remarkable property are quite unlike the integers

Qhorin Halfhand: The Watch has given you a great gift. And you only have one thing to give in return: your life.

Jon Snow: I'd gladly give my life.

Qhorin Halfhand: I don’t want you to be glad about it! I want you to curse and fight until your heart’s done pumping.

--Game of Thrones, Season 2.

We're talking about a person who, along with her partner, gives to efficient charity twice as much money as she spends on herself. There's no way she doesn't actually believe what she says and still does that.

The following quotes were heavily upvoted, but then turned out to be made by a Will Newsome sockpuppet who edited the quote afterward. The original comments have been banned. The quotes are as follows:

If dying after a billion years doesn't sound sad to you, it's because you lack a thousand-year-old brain that can make trillion-year plans.

— Aristosophy

One wish can achieve as much as you want. What the genie is really offering is three rounds of feedback.

— Aristosophy

If anyone objects to this policy response, please PM me so as to not feed the troll.

The only road to doing good shows, is doing bad shows.

• Louis C.K., on Reddit

“Why do you read so much?”

Tyrion looked up at the sound of the voice. Jon Snow was standing a few feet away, regarding him curiously. He closed the book on a finger and said, “Look at me and tell me what you see.”

The boy looked at him suspiciously. “Is this some kind of trick? I see you. Tyrion Lannister.”

Tyrion sighed. “You are remarkably polite for a bastard, Snow. What you see is a dwarf. You are what, twelve?”

“Fourteen,” the boy said.

“Fourteen, and you’re taller than I will ever be. My legs are short and twisted, and I walk with difficulty. I require a special saddle to keep from falling off my horse. A saddle of my own design, you may be interested to know. It was either that or ride a pony. My arms are strong enough, but again, too short. I will never make a swordsman. Had I been born a peasant, they might have left me out to die, or sold me to some slaver’s grotesquerie. Alas, I was born a Lannister of Casterly Rock, and the grotesqueries are all the poorer. Things are expected of me. My father was the Hand of the King for twenty years. My brother later killed that very same king, as it turns out, but life is full of these little ironies. My sister married the new king and

Discovery is the privilege of the child, the child who has no fear of being once again wrong, of looking like an idiot, of not being serious, of not doing things like everyone else.

Alexander Grothendieck

...a good way of thinking about minimalism [about truth] and its attractions is to see it as substituting the particular for the general. It mistrusts anything abstract or windy. Both the relativist and the absolutist are impressed by Pilate's notorious question 'What is Truth?', and each tries to say something useful at the same high and vertiginous level of generality. The minimalist can be thought of turning his back on this abstraction, and then in any particular case he prefaces his answer with the prior injunction: you tell me. This does not mean, 'You tell me what truth is.' It means, 'You tell me what the issue is, and I will tell you (although you will already know, by then) what the truth about the issue consists in.' If the issue is whether high tide is at midday, then truth consists in high tide being at midday... We can tell you what truth amounts to, if you first tell us what the issue is.

There is a very powerful argument for minimalism about truth, due to the great logician Gottlob Frege. First, we should notice the transparency property of truth. This is the fact that it makes no difference whether you say that it is raining, or it is true that it is raining, or tr

"Nontrivial measure or it didn't happen." -- Aristosophy

(Who's Kate Evans? Do we know her? Aristosophy seems to have rather a lot of good quotes.)

It is now clear to us what, in the year 1812, was the cause of the destruction of the French army. No one will dispute that the cause of the destruction of Napoleon's French forces was, on the one hand, their advance late in the year, without preparations for a winter march, into the depths of Russia, and, on the other hand, the character that the war took on with the burning of Russian towns and the hatred of the foe aroused in the Russian people. But then not only did no one foresee (what now seems obvious) that this was the only way that could lead to the destruction of an army of eight hundred thousand men, the best in the world and led by the best generals, in conflict with a twice weaker Russian army, inexperienced and led by inexperienced generals; not only did no one foresee this, but all efforts on the part of the Russians were constantly aimed at hindering the one thing that could save Russia, and, on the part of the French, despite Napoleon's experience and so-called military genius, all efforts were aimed at extending as far as Moscow by the end of summer, that is, at doing the very thing that was to destroy them.

• Leo Tolstoy, "War and Peace", trans. Pevear and Volokhonsky

"If your plan is for one year plant rice. If your plan is for 10 years plant trees. If your plan is for 100 years educate children" - Confucius

Nothing can be soundly understood
If daylight itself needs proof.

Imām al-Ḥaddād (trans. Moṣṭafā al-Badawī), "The Sublime Treasures: Answers to Sufi Questions"

Subway ad: "146 people were hit by trains in 2011. 47 were killed."

Guy on Subway: "That tells me getting hit by a train ain't that dangerous."

• Nate Silver, on his Twitter feed @fivethirtyeight