The right to be let alone is indeed the beginning of all freedom.

What a man thinks is no concern of the government.

The Fifth Amendment is an old friend and a good friend, one of the great landmarks in men's struggle to be free of tyranny, to be decent and civilized.

Restriction of free thought and free speech is the most dangerous of all subversions. It is the one un-American act that could most easily defeat us.

Trees have judicial standing, and probably grass too.

Men need to know the elemental challenges that sea and mountains present. They need to know what it is to be alive and to survive when great storms come. They need to unlock the secrets of streams, lakes, and canyons and to find how these treasures are veritable storehouses of inspiration. They must experience the sense of mastery of adversity. They must find a peak or a ridge that they can reach under their own power alone.

Fear of ideas makes us impotent and ineffective.