We are made happy when reason can discover no occasion for it. The memory of some past moments is more persuasive than the experience of present ones. There have been visions of such breadth and brightness that these motes were invisible in their light.
Henry David Thoreau (July 12, 1817 - 1862) was an American essayist, poet, and naturalist. Among his lasting contributions were his writings on natural history and philosophy, where he anticipated the methods and findings of ecology and environmental history, two sources of modern day environmentalism.