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AB: Somebody recently said, and I have been considering since I heard it, a very simple question: if time travel is possible, then where are the time travelers?
TM: Well, when I asked that question to my sources, they said you can only travel as far back into the past as the moment of the invention of the first time machine. Because before that there were no time machines.
AB: Uh, let me think about that: you can only travel back as far as the invention of the first time machine, because before that there was no capability…
TM: It’s like trying to drive where there are no roads. It also means that when you invent the first time machine, instantly time machines will appear by the tens of thousands, having come through time back to see the first flight into time.

(Art Bell interviews Terence McKenna on Coast to Coast AM, May 22nd 1997)

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“In these moments of peace, deprivation seems a strange sort of gift. I find food in a couple hours of fishing each day, and I seek shelter in a rubber tent. How unnecessarily complicated my past life seems. For the first time, I clearly see a vast difference between human needs and human wants. Before this voyage, I always had what I needed - food, shelter, clothing, and companionship - yet I was often dissatisfied when I didn't get everything I wanted, when people didn't meet my expectations, when a goal was thwarted, or when I couldn't acquire some material goody. My plight has given me a strange kind of wealth, the most important kind. I value each moment that is not spent in pain, desperation, hunger, thirst, or loneliness. Even here, there is richness all around me.”

(Steven Callahan, “Adrift, seventy-six days lost at sea”)

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Quando vinha lá atrás, nunca olhava para a frente. Agora que aqui estou, olho de vez em quando lá para trás, e surpreende-me ter aqui chegado. Veremos até onde vou.