The best experiments often come from simple ideas and careful observation.
The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy, and finally oblivion.
没有阴影就没有阳光,了解夜晚是必要的。