Lyndon Johnson actually said...

I should like to repeat again that our purpose is peace.

We must clean up our air, clean up our rivers, clean up our streams, and open up the land for our people if we are to preserve the heritage ...

If we don't act promptly, and we don't act prudently and progressively, we will face a real crisis in the quality of American life.

It cannot come without education or without leadership, or without patience and perseverance.