The earth is attempting to rid itself of an infection by human parasite.

What can the redwoods tell us about ourselves? Well, I think they can tell us something about human time. The flickering, transitory quality of human time and the brevity of human life - the necessity to love.

If equations are trains threading the landscape of numbers, then no train stops at pi.

He liked the loneliness of inner space, the sense of being forgotten by the world.

Humans in space suits make monkeys nervous.

Time has a different quality in a forest, a different kind of flow. Time moves in circles, and events are linked, even if it's not obvious that they are linked. Events in a forest occur with precision in the flow of tree time, like the motions of an endless dance. (p. 12)

The Ludolphian number is fixed in eternity— not a digit out of place, all characters in their proper order, an endless sentence written to the end of the world by the division of the circle’s diameter into its circumference.