Freedom of movement is the very essence of our free society -- once the right to travel is curtailed, all other rights suffer.

These unwritten amenities have been in part responsible for giving our people the feeling of independence and self-confidence, the feeling of creativity. These amenities have dignified the right of dissent and have honored the right to be nonconformists and the right to defy submissiveness. They have encouraged lives of high spirits rather than hushed, suffocating silence.

Ideas are indeed the most dangerous weapons in the world. Our ideas of freedom are the most powerful political weapons man has ever forged.

The Arctic has a call that is compelling. The distant mountains [of the Brooks Range in Alaska] make one want to go on and on over the next ridge and over the one beyond. The call is that of a wilderness known only to a few...This last American wilderness must remain sacrosanct.

Trees have judicial standing, and probably grass too.

When a legislature undertakes to proscribe the exercise of a citizen's constitutional right to free speech, it acts lawlessly; and the citizen can take matters into his own hands and proceed on the basis that such a law is no law at all.

Men may believe what they cannot prove. They may not be put to the proof of their religious doctrines or beliefs. Religious experiences which are as real as life to some may be incomprehensible to others.