„The battle we have fought, and are still fighting, for the forests is a part of the eternal conflict between right and wrong, and we cannot expect to see the end of it. … So we must count on watching and striving for these trees, and should always be glad to find anything so surely good and noble to strive for.“

— John Muir

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„We cannot afford weakly to blind ourselves to the actual conflict which faces us today. The issue is joined, and we must fight or fail.“
— Theodore Roosevelt
„You cannot plant greatness as you plant yams or maize. Who ever planted an iroko tree — the greatest tree in the forest? You may collect all the iroko seeds in the world, open the soil and put them there. It will be in vain. The great tree chooses where to grow and we find it there, so it is with the greatness in men.“
— Chinua Achebe
„Must be a yearning deep in human heart to stop other people from doing as they please. Rules, laws — always for other fellow. A murky part of us, something we had before we came down out of trees, and failed to shuck when we stood up. Because not one of those people said: Please pass this so that I won't be able to do something I know I should stop. Nyet, tovarishchee, was always something they hated to see neighbors doing. Stop them for their own good.“
— Robert A. Heinlein