" No small art is it to sleep: it is necessary for that purpose to keep awake all day.
Ten times a day must thou overcome thyself: that causeth wholesome weariness, and is poppy to the soul.
Ten times must thou reconcile again with thyself; for overcoming is bitterness, and badly sleep the unreconciled.
Ten truths must thou find during the day; otherwise wilt thou seek truth during the night, and thy soul will have been hungry. "

― Friedrich Nietzsche