The fuel in the earth will be exhausted in a thousand or more years, and its mineral wealth, but man will find substitutes for these in the winds, the waves, the sun's heat, and so forth.

The honey-bee's great ambition is to be rich, to lay up great stores, to possess the sweet of every flower that blooms. She is more than provident. Enough will not satisfy her, she must have all she can get by hook or crook.

The simplicity of winter has a deep moral. The return of Nature, after such a career of splendor and prodigality, to habits so simple and austere, is not lost either upon the head or the heart. It is the philosopher coming back from the banquet and the wine to a cup of water and a crust of bread.

Nature exists for man no more than she does for monkeys, and is as regardless of his life or pleasure or success as she is of the fleas. Her waves will drown him, her fire burn him, and her earth devour him, her storms and lightning smite him, as if he were only a dog.

The lure of the distant and the difficult is deceptive. The great opportunity is where you are.

Nature comes home to one most when one is at home. The stranger and traveler finds her a stranger and traveler also.

Joy in the universe, and keen curiosity about it all - that has been my religion.