Physical Tree Topology

Famous quotes containing the words physical and/or tree:

“The vast material displacements the machine has made in our physical environment are perhaps in the long run less important than its spiritual contributions to our culture.”
—Lewis Mumford (1895–1990)

“Our courage breaks like an old tree in a black wind and dies,
But we have hidden in our hearts the flame out of the eyes
Of Cathleen, the daughter of Houlihan.”
—William Butler Yeats (1865–1939)