The rocks have a history; gray and weatherworn, they are veterans of many battles; they have most of them marched in the ranks of vast stone brigades during the ice age; they have been torn from the hills, recruited from the mountaintops, and marshaled on the plains and in the valleys; and now the elemental war is over, there they lie waging a gentle but incessant warfare with time and slowly, oh, so slowly, yielding to its attacks!

Science has done more for the development of western civilization in one hundred years than Christianity did in eighteen hundred years.

The Universe is a pretty big place... And the one thing I know about nature is it hates to waste anything. So I guess I'd say if it is just us, an awful lot of space is going to waste. The earth is not alone, it is not like a single apple on a tree; there are many apples on the tree, and there are many trees in the orchard.

Before the bud swells, before the grass springs, before the plough is started, comes the sugar harvest. It is sequel of the bitter frost; a sap run is the sweet goodbye of winter.

Few persons realize how much of their happiness is dependent upon their work, upon the fact that they are busy and not left to feed upon themselves. Blessed is the person who has some congenial work, some occupation in which to place one's heart, and which affords a complete outlet to all the forces that are in him or her.

There are nine countries in the world that have nuclear weapons. There are about 27,000 nuclear weapons total on the planet. The countries that have nuclear weapons deploy them ready for use and have doctrines saying that they would use them in certain circumstances.

[T]he cold warms me—after a different fashion from that of the kitchen stove.