The most depressing aspect of the lives of the couples you watch surreptitiously arguing in restaurants is that they are almost always unaware of the true subject of argument. –

You don’t become completely free by just avoiding to be a slave; you also need to avoid becoming a master.*

Never say no twice if you mean it.

An idea starts to be interesting when you get scared of taking it to its logical conclusion. –

You will be civilized on the day you can spend a long period doing nothing, learning nothing, and improving nothing, without feeling the slightest amount of guilt.

You are rich if and only if money you refuse tastes better than money you accept.

There are two types of people: those who try to win and those who try to win arguments. They are never the same.

Don’t talk about “progress” in terms of longevity, safety, or comfort before comparing zoo animals to those in the wilderness. –

The difference between technology and slavery is that slaves are fully aware that they are not free.