in Thoreau’s Journal:
To be calm, to be serene! There is the calmness of the lake when there is not a breath of wind; there is the calmness of a stagnant ditch. So it is with us. Sometimes we are clarified and calmed healthily, as we never were before in our lives, not by an opiate, but by some unconscious obedience to the all-just laws so that we become like a still lake of purest crystal and without an effort our depths are revealed to ourselves. All the world goes by us and is reflected in our deeps. Such clarity! obtained by such pure means! by simple living, by honesty of purpose. We live and rejoice. I awoke into a music which no one about me heard. Whom shall I thank for it? The luxury of wisdom! the luxury of virtue! Are there any intemperate in these things? I feel my Maker blessing me. To the sane man the world is a musical instrument. The very touch affords an exquisite pleasure.