To the scientist Nature is a storehouse of facts, laws, processes; to the artist she is a storehouse of pictures; to the poet she is a storehouse of images, fancies, a source of inspiration; to the moralist she is a storehouse of precepts and parables; to all she may be a source of knowledge and joy.

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.

The commitment to international agreements is embodied, it's found in the U.S. Constitution. Article Six of the U.S. Constitution provides that treaties of the United States are part of the supreme law of the land along with the constitution itself and laws passed by Congress. Well, the US government certainly has not been acting in recent years as if treaties were part of the supreme law of the land.

I have discovered the secret of happiness - it is work, either with the hands or the head. The moment I have something to do, the draughts are open and my chimney draws, and I am happy.

One resolution I have made, and try always to keep, is this: ‘To rise above little things’.

The floating vapour is just as true an illustration of the law of gravity as the falling avalanche.

Happiness comes most to persons who seek it least and think least about it. It is not an object to be sought, it is a state to be induced. It must follow and not lead. It must overtake you, and not you overtake it.