Man is so essentially a gregarious animal that to come upon a lone house in a wilderness is more depressing than the forests.

Nature is never alone; it knows no solitude; it is a mighty whole, each part of which is in constant communication with every other part.

Nature needs no telephone; from time immemorial it has used wireless telegraphy in a condition of perfection unknown to man.

Every morning Mount Blanc sends a message to Pike's Peak, and it sends it on over the waters to Fujisan.

The bosom of the earth thrills with nervous energy; the air is charged with electric force; the blue ether of the universe throbs with motion.