Six hours of police surveillance (such as I have had), or one brutal rejection from an inn-door, change your views upon the subject like a course of lectures.
被警察监视六小时——我就经历过——或在旅店门口遭一次粗暴拒绝,便足以像一整套讲座那样,改变你对这个问题的看法。
— Robert Louis Stevenson · An Inland Voyage · La Fère of Cursed Memory —