The countries outside the Non-Proliferation Treaty also are bound by that obligation [ Article Six of the treaty] according to, at least it's a strong implication of, a 1996 opinion of the International Court of Justice.

Man takes root at his feet, and at best he is no more than a potted plant in his house or carriage till he has established communication with the soil by the loving and magnetic touch of his soles to it.

Now is the time of the illuminated woods ... when every leaf glows like a tiny lamp.

The secret of happiness is something to do.

[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.

We have produced some good walkers and saunterers, and some noted climbers; but as a staple recreation, as a daily practice, the mass of the people dislike and despise walking.

I do not think I exaggerate the importance or the charms of pedestrianism, or our need as a people to cultivate the art. I think it would tend to soften the national manners, to teach us the meaning of leisure, to acquaint us with the charms of the open air, to strengthen and foster the tie between the race and the land. No one else looks out upon the world so kindly and charitably as the pedestrian; no one else gives and takes so much from the country he passes through.