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.

One can only learn his powers of action by action, and his powers of thought by thinking

Life is a struggle, but not a warfare.

[Theodore Roosevelt] was a naturalist on the broadest grounds, uniting much technical knowledge with knowledge of the daily lives and habits of all forms of wild life. He probably knew tenfold more natural history than all the presidents who had preceded him, and, I think one is safe in saying, more human history also.

If you want to see birds, you must have birds in your heart.

The thing that I focus on because I don't think it gets enough attention is that among the world's major powers, there is still a nuclear balance of terror - I'm talking about between the United States and Russia, the United States and China.

Nature is not benevolent; Nature is just, gives pound for pound, measure for measure, makes no exceptions, never tempers her decrees with mercy, or winks at any infringement of her laws.