When we go down to the low-tide line, we enter a world that is as old as the earth itself - the primeval meeting place of the elements of earth and water, a place of compromise and conflit and eternal change.

It is not half so important to know as to feel.

Knowing what I do, there would be no future peace for me if I kept silent... It is, in the deepest sense, a privilege as well as a duty to speak out to many thousands of people.

Those who dwell, as scientists or laymen, among the beauties and mysteries of the earth, are never alone or weary of life.

The Choice, after all, is ours to make.

In nature nothing exists alone.

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.