We use pandas and eagles and things. I'd love to see a wilderness society with an angry-looking wolverine as their logo.

Every native species, however humble in appearance...has its place in the nation's heritage. It is a masterpiece of evolution, an ancient, multifaceted entity that shares the land with us.

Progress, then, is a property of the evolution of life as a whole by almost any conceivable intuitive standard.... let us not pretend to deny in our philosophy what we know in our hearts to be true.

Each species is a masterpiece, a creation assembled with extreme care and genius.

If history and science have taught us anything, it is that passion and desire are not the same as truth.

The cost of scientific advance is the humbling recognition that reality was not constructed to be easily grasped by the human mind. This is the cardinal tenet of scientific understanding. Our species and its ways of thinking are a product of evolution, not the purpose of evolution.

Human nature is deeper and broader than the artificial contrivance of any existing culture.