Let's be clear: all professions look bad in the movies. And there's a good reason for this. Movies don't portray career paths, they conscript interesting lifestyles to serve a plot. So lawyers are all unscrupulous and doctors are all uncaring. Psychiatrists are all crazy, and politicians are all corrupt. All cops are psychopaths, and all businessmen are crooks. Even moviemakers come off badly: directors are megalomaniacs, actors are spoiled brats. Since all occupations are portrayed negatively, why expect scientists to be treated differently?

Conventional wisdom is invariably out of date. Because in the time it has taken to become conventional - to become what everyone believes - the world has moved on. Conventional wisdom is a remnant of the past.

In other centuries, human beings wanted to be saved, or improved, or freed, or educated. But in our century, they want to be entertained. The great fear is not of disease or death, but of boredom. A sense of time on our hands, a sense of nothing to do. A sense that we are not amused.

Even if you don't believe in God, you still have to believe in something that gives meaning to your life, and shapes your sense of the world. Such a belief is religious.

Raising children is, in a sense, the reason the society exists in the first place. It's the most important thing that happens, and it's the culmination of all the tools and language and social structure that has evolved.

Each person bears a fear which is special to him. One man fears a close space and another man fears drowning; each laughs at the other and calls him stupid. Thus fear is only a preference, to be counted the same as the preference for one woman or another, or mutton for pig, or cabbage for onion.

Most areas of intellectual life have discovered the virtues of speculation, and have embraced them wildly. In academia, speculation is usually dignified as theory.