Do not despise your own place and hour. Every place is under the stars, every place is the center of the world.

Love is the measure of life; only so far as we love do we really live.

The overall quantity of nuclear weapons in the world continues to decline slowly.

The place to observe nature is where you are.

[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.

Following World War II, the U.S. was the architect of the UN system, and the world financial system, and the Human Rights Declaration, and of course the United Nations is based here in New York City. But, unfortunately, especially in the last decade, the U.S. really has been turning its back on international agreements and the set of agencies and procedures that they create as a means for governing the world.

Life is a struggle, but not a warfare.