Histories make men wise ; poems witty; the mathematics subtle; natural philosophy deep ; moral grave ; logic and rhetoric able to contend.历史使人明智；诗词使人灵秀；数学使人周密；自然哲学使人深刻；伦理使人庄重；逻辑修辞学使人善辨。——英国哲学家 培根. F.