Always the edge of the sea remains an elusive and indefinable boundary. The shore has a dual nature, changing with the swing of the tides, belonging now to the land, now to the sea.

Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.

Science is part of the reality of living; it is the what, the how, and the why of everything in our experience.

There is one quality that characterizes all of us who deal with the sciences of the earth and its life - we are never bored.

The Choice, after all, is ours to make.

But man is a part of nature, and his war against nature is inevitably a war against himself.

If I had influence with the good fairy who is supposed to preside over the christening of all children I should ask that her gift to each child in the world be a sense of wonder so indestructible that it would last throughout life, as an unfailing antidote against the boredom and disenchantments of later years, the sterile preoccupation with things artificial, the alienation from the sources of our strength.