To understand the living present, and the promise of the future, it is necessary to remember the past.

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

In every outthrust headland, in every curving beach, in every grain of sand there is the story of the earth.

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

Every mystery solved brings us to the threshold of a greater one.

Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts.

The control of nature is a phrase conceived in arrogance.