The years of early childhood are the time to prepare the soil.

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.

In nature nothing exists alone.

Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts. There is something infinitely healing in the repeated refrains of nature -- the assurance that dawn comes after night, and spring after winter.

For the sense of smell, almost more than any other, has the power to recall memories and it's a pity we use it so little.

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

To stand at the edge of the sea, to sense the ebb and flow of the tides, to feel the breath of a mist moving over a great salt marsh, to watch the flight of shore birds that have swept up and down the surf lines of the continents for untold thousands of years, to see the running of the old eels and the young shad to the sea, is to have knowledge of things that are as nearly eternal as any earthly life can be.