Both the cockroach and the bird would get along very well without us, although the cockroach would miss us most.

Custom has furnished the only basis which ethics have ever had.

How anyone can profess to find animal life interesting and yet take delight in reducing the wonder of any animal to a bloody mass of fur or feathers?

In history as it comes to be written, there is usually some Spirit of the Age which historians can define, but the shape of things is seldom so clear to those who live them. To most thoughtful men it has generally seemed that theirs was an Age of Confusion.

The typical American believes that no necessity of the soul is free and that there are precious few, if any, which cannot be bought.

The wilderness and the idea of wilderness is one of the permanent homes of the human spirit.

There is no conceivable human action which custom has not at one time justified and at another condemned.