一本好书的衡量标准在于它是否能让你思考、感受并以不同的方式看待世界。
The book is a mirror: if an ape looks into it, an apostle is unlikely to look out.
"Ein Buch ist wie ein Garten, den man in der Tasche trägt."
The Langlands correspondence is not just a theorem but a guiding principle for future discoveries.