Even in the obscure vast history of a planet the time it takes to make a forest counts. It takes a while. And not every planet can do it; it is no common effect, that tangling of the sun's first cool light in the shadow and complexity of innumberable wind-stirred branches.
Ursula K. Le GuinNow they came back to him, on this night he was seventeen years old. All the years and places of his brief broken life came within mind's reach and made a whole again. He knew once more, at last, after this long, bitter, waisted time, who he was and where he was. But where he must go in the years to come, that he could not see; and he feared to see it.
Ursula K. Le GuinDo you see, Arren, how an act is not, as young men think, like a rock that one picks up and throws, and it hits or misses, and that's the end of it. When that rock is lifted, the earth is lighter; the hand that bears it is heavier. When it is thrown, the circuits of the stars respond, and where it strikes or falls the universe is changed.
Ursula K. Le Guin