People commended unto Zarathustra a wise man, as one who could discourse well about sleep and virtue: greatly was he honoured and rewarded for it, and all the youths sat before his chair. To him went Zarathustra, and sat among the youths before his chair. And thus spake the wise man:

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Respect and modesty in presence of sleep! That is the first thing! And to go out of the way of all who sleep badly and keep awake at night!

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- Friedrich Nietzsche, Thus Spoke Zarathustra