Why do some die and some live? The answer was clearly, that on the whole the best fitted live. From the effects of disease the most healthy escaped; from enemies, the strongest, swiftest, or the most cunning; from famine, the best hunters or those with the best digestion; and so on. Then it suddenly flashed upon me that this self-acting process would necessarily improve the race, because in every generation the inferior would inevitably be killed off and the superior would remain-that is, the fittest would survive.
That enforced time when you have to switch off, that you're on a plane, is so unusual these days. It's just that thing of not being able to interact with other people through e-mails or social media or whatever. It's crazy how you even notice that you're not able to do that. I find that the kind of traveling - long days, particularly if you go somewhere to do a show, and then traveling again the next day - a lot of people would find pretty challenging, but I find it energizing in a weird way.