How beautifully the leaves grow old! How full of light and color are their last days!

The art of nature is all in the direction of concealment.

How readily the bluebirds become our friends and neighbors when we offer them suitable nesting retreats!

Serene, I fold my hands and wait, Nor care for wind, nor tide, nor sea; I rave no more 'gainst time or fate, For lo! my own shall come to me.

Some men are like nails, very easily drawn; others however are more like rivets never drawn at all.

Nature will not be conquered, but gives herself freely to her true lover -- to him who revels with her, bathes in her seas, sails her rivers, camps in her woods, and with no mercenary ends, accepts all.

The cold warms me--after a different fashion from that of the kitchen stove.

There is an international treaty framework for this. It's the Nuclear Non-Proliferation Treaty (NPT). Most countries in the world are members of the treaty.

We cannot walk through life on mountain peaks.

Blessed is the man who has some congenial work, some occupation in which he can put his heart, and which affords a complete outlet to all the forces there are in him.

The life of a swarm of bees is like an active and hazardous campaign of an army: the ranks are being continually depleted and continually recruited.

Naturalists, like poets, are born and then made only by years of painstaking observation.

The tendinous part of the mind, so to speak, is more developed in winter; the fleshy, in summer. I should say winter had given the bone and sinew to literature, summer the tissues and the blood.

Most birds are very stiff-necked, like the robin, and as they run or hop upon the ground, carry the head as if it were riveted to the body. Not so the oven-bird, or the other birds that walk, as the cow-bunting, or the quail, or the crow. They move the head forward with the movement of the feet.

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

All birds are incipient or would-be songsters in the spring. I find corroborative evidence of this even in the crowing of the cock.

You cannot cause disproportionate damage to the environment; you cannot harm neutral states. The court said that the threat or use of nuclear weapons is generally contrary to the international law of armed conflict.

One is tempted to say that the most human plants, after all, are the weeds.

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

It is always easier to believe than to deny. Our minds are naturally affirmative.