“Wilderness and motors are incompatible and the former can best be experienced, understood and enjoyed when the machines are left behind where they belong -- on the superhighways and in the parking lots, on the reservoirs and in the marinas.”

“Industrial tourism is a threat to the national parks. But the chief victims of the system are the motorized tourists. They are being robbed and robbing themselves. So long as they are unwilling to crawl out of their cars they will not discover the treasures of the national parks and will never escape the stress and turmoil of the urban-suburban complexes which they had hoped, presumably, to leave behind for a while.”

“A man on foot, on horseback or on a bicycle will see more, feel more, enjoy more in one mile than the motorized tourists can in a hundred miles.”

“I thought of the wilderness we had left behind us, open to sea and sky, joyous in its plenitude and simplicity, perfect yet vulnerable, unaware of what is coming, defended by nothing, guarded by no one.”

“We can have wilderness without freedom; we can have wilderness without human life at all, but we cannot have freedom without wilderness, we cannot have freedom without leagues of open space beyond the cities, where boys and girls, men and women, can live at least part of their lives under no control but their own desires and abilities, free from any and all direct administration by their fellow men.”

“The automobile, which began as a transportation convenience, has become a bloody tyrant (50,000 lives a year), and it is the responsibility of the park service, as well as that of everyone else concerned with preserving both wilderness and civilization, to begin a campaign of resistance.”

“To all accusations of excessive development the administrators can reply, as they will if pressed hard enough, that they are giving the public what it wants, that their primary duty is to serve the public not preserve the wilds. "Parks are for people" is the public relations slogan, which decoded means that the parks are for people-in-automobiles. Behind the slogan is the assumption that the majority of Americans, exactly like the managers of the tourist industry, expect and demand to see their national parks from the comfort, security and convenience of their automobiles.Is this assumption correct? Perhaps. Does that justify the continued and increasing erosion of the parks? It does not.”