经典是一本永远没有说完自己话的书。
A classic is a book that has never finished saying what it has to say.
The best time to plant a tree was 20 years ago; the second-best time is now.
The dialectical unity of Love and Strife is the eternal driving force in the cosmos.
物理学的美丽在于它能够用最深刻的理论解释最简单的现象。
To one who has faith, no explanation is necessary. To one without faith, no explanation is possible.