I suppose if there were a part of the world in which mastodon still lived, somebody would design a new gun, and men, in their eternal impudence, would hunt mastodon as they now hunt elephant. Impudence seems to be the word. At least David and Goliath were of the same species, but, to an elephant, a man can only be a midge with a deathly sting.

I know animals more gallant than the African warthog, but none more courageous. He is the peasant of the plains - the drab and dowdy digger in the earth. He is the uncomely but intrepid defender of family, home, and bourgeois convention, and he will fight anything of any size that intrudes upon his smug existence. ... His eyes are small and lightless and capable of but one expression - suspicion. What he does not understand, he suspects, and what he suspects, he fights.

the sun is as dispassionate as the hand of a man who greets you with his mind on other things.

We fly, but we have not 'conquered' the air. Nature presides in all her dignity, permitting us the study and the use of such of her forces as we may understand. It is when we presume to intimacy, having been granted only tolerance, that the harsh stick fall across our impudent knuckles and we rub the pain, staring upward, startled by our ignorance.

Success breeds confidence.

To see ten thousand animals untamed and not branded with the symbols of human commerce is like scaling an unconquered mountain for the first time, or like finding a forest without roads or footpaths, or the blemish of an axe. You know then what you had always been told -- that the world once lived and grew without adding machines and newsprint and brick-walled streets and the tyranny of clocks.

Talk lives in a man’s head, but sometimes it is very lonely because in the heads of many men there is nothing to keep it company - and so talk goes out through the lips.