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.

Life is a struggle, but not a warfare.

In 2002 the [George] Bush administration effectively put an end to negotiations of an agreement which would have established inspection procedures to ensure or to monitor compliance with the existing legal ban on biological weapons.

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.

If you think you can do it, you can.

When I look up into the starry heavens at night and reflect upon what it is I really see there, I am constrained to say, ´there is no god´.