世界对于思考者是喜剧，对于感受者是悲剧。
The world is a comedy to those that think, a tragedy to those that feel.
类比城市是一个类似于另一个城市的城市。
The world is a book, and those who do not travel read only one page.
实现明天理想的唯一障碍是今天的疑虑。
The most sustainable product is the one that already exists.
All interest in disease and death is only another expression of interest in life.