The truths of nature are one eternal change, one infinite variety. There is no bush on the face of the globe exactly like another bush; there are no two trees in the forest whose boughs bend into the same network, nor two leaves on the same tree which could not be told one from the other, nor two waves in the sea exactly alike.
John RuskinOne of the worst diseases to which the human creature is liable is its disease of thinking.
John Ruskin