“With the utmost love and attention the man who walks must study and observe every smallest living thing, be it a child, a dog, a fly, a butterfly, a sparrow, a worm, a flower, a man, a house, a tree, a hedge, a snail, a mouse, a cloud, a hill, a leaf, or no more than a poor discarded scrap of paper on which, perhaps, a dear good child at school has written his first clumsy letters. The highest and the lowest, the most serious and the most hilarious things are to him equally beloved, beautiful, and valuable.”