If people destroy something replaceable made by mankind, they are called vandals; if they destroy something irreplaceable made by God, they are called developers.

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?

If we do not permit the earth to produce beauty and joy, it will in the end not produce food, either.

The famous balance of nature is the most extraordinary of all cybernetic systems. Left to itself, it is always self-regulated.

When, in the present world, men behave well, that is no doubt sometimes because they are creatures of habit as well as, sometimes, because they are reasonable.

To have passed through life and never experienced solitude is to have never known oneself. To have never known oneself is to have never known anyone.

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