Physical Tree Topology

Famous quotes containing the words physical and/or tree:

“Those things which now most engage the attention of men, as politics and the daily routine, are, it is true, vital functions of human society, but should be unconsciously performed, like the corresponding functions of the physical body.”
—Henry David Thoreau (1817–1862)

“A tree there is that from its topmost bough
Is half all glittering flame and half all green
Abounding foliage moistened with the dew;
And half is half and yet is all the scene;
And half and half consume what they renew....”
—William Butler Yeats (1865–1939)