The land-relation is still strictly economic, entailing privileges but not obligations

I shall now confess to you that none of those three trout had to be beheaded, or folded double, to fit their casket. What was big was not the trout, but the chance. What was full was not my creel, but my memory.

I confess my own leisure to be spent entirely in search of adventure, without regard to prudence, profit, self improvement, learning, or any other serious thing.

...to any one for whom wild things are something more than a pleasant diversion, (conservation) constitutes one of the milestones in moral evolution.

An Ecologist lives in a world of wounds.

The life of every river sings its own song, but in most the song is long marred by the discords of misuse.

At first blush I am tempted to conclude that a satisfactory hobby must be in large degree useless, inefficient, laborious, or irrelevant.